Syllabus Edition

First teaching 2023

First exams 2025

|

Simple Harmonic Motion (SL IB Physics)

Topic Questions

4 hours67 questions
1
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1 mark

Which graph correctly shows how the kinetic energy of an oscillator varies as a function of time through one complete oscillation?

ib-hl-hmcq-2-ans-options

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    2
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    1 mark

    The defining equation of SHM describes the relationship between acceleration, a, angular frequency, ω, and displacement, x, from the equilibrium position:

     a space equals space minus omega squared x

    Which value correctly shows the resulting acceleration if the angular frequency was doubled?

    • negative 4 a

    • 1 fourth a

    • 2 a

    • 4 a

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    3
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    1 mark

    The graph shows the displacement over time of a simple pendulum oscillating in simple harmonic motion. 

    ib-hl-emcq-5-q-stem

    What is the potential energy of the pendulum at points X, Y and Z?

     

     

    X

    Y

    Z

    A.

    Max

    Zero

    Max

    B.

    Zero

    Max

    Zero

    C.

    Max Max Zero

    D.

    Zero

    Zero

    Max

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      4
      Sme Calculator
      1 mark

      A simple pendulum undergoes simple harmonic motion. The kinetic energy of the pendulum is at a maximum at the equilibrium position.

      How many times during one oscillation is the kinetic energy of the pendulum equal to its gravitational potential energy?

      • 1

      • 2

      • 3

      • 4

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      5
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      1 mark

      A mass with mass, m, is attached to a spring with a spring constant, k, and oscillates in simple harmonic motion with a period, T

      A new spring is introduced with a spring constant of 4k. How does this affect the period of the oscillation?

      • 1 fourth T

      • 1 half T

      • 2 T

      • 4 T

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      6
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      1 mark

      A small ball is attached to a thread of length l, and set to oscillate isochronously.

      If the length of the thread is reduced by 10%, what effect will this have on the period, T, of the oscillation?

      • 0.1 space T

      • 0.3 T

      • 0.6 T

      • 0.9 T

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      7
      Sme Calculator
      1 mark

      A particle oscillates in simple harmonic motion. The particle's displacement over time is shown in the following graph.

      ib-hl-emcq-q10-stem

      Which graphs are the correct velocity-time and acceleration-time graphs for this particle?

       

      b-hl-emcq-q10-options

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        8
        Sme Calculator
        1 mark

        Identify the incorrect statement about the displacement of an object oscillating in simple harmonic motion.

        • Displacement is a vector quantity

        • Displacement and velocity act in opposite directions

        • Displacement is proportional to the restoring force

        • Displacement is proportional to acceleration

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        9
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        1 mark

        Select the graph that shows the oscillation beginning at positive amplitude x0.

        4-1-q3-sl-easy-mcq-phy

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          10
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          1 mark

          The total energy E T in system in simple harmonic motion reflects the energy transfers between the kinetic energy E K store and the potential energy E P store.

          Identify the correct equation for the total energy of a system in simple harmonic motion.

          • ET = EPEK

          • ET = EP × EK

          • ET E subscript straight K over E subscript straight P

          • ET = EPEK

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          11
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          1 mark

          Select the position on the acceleration-time graph where displacement x = 0

          4-1-q5

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            12
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            1 mark

            Identify the statement that is not a condition of simple harmonic motion.

            • The restoring force is directed toward the amplitude x0

            • Acceleration is directed toward the equilibrium position

            • The oscillations are isochronous

            • The magnitude of the restoring force is proportional to the displacement

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            13
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            1 mark

            Choose the graph that shows an oscillation beginning at equilibrium.

            4-1-q7-sl-easy-mcq-phy

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              14
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              1 mark

              Identify the correct equation for time period T with respect to frequency f.

              • T1 halfπf

              • T 1 over f

              • T1 halff

              • T = f

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              15
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              1 mark

              Select the position on the displacement-time graph that shows when the velocity is zero.

              4-1-q9-sl-easy-mcq-phy

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                16
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                1 mark

                As a mass-spring system oscillates in simple harmonic motion, the restoring force F is proportional to the displacement x.

                F = −kx

                Choose the line that shows the correct units for each quantity.

                 

                Force F

                Spring constant k

                Displacement x

                A.

                N

                N m−1

                m

                B.

                Nm

                N

                m2

                C.

                N m−1 Nm ml

                D.

                N

                N kg−1

                m

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                  1
                  Sme Calculator
                  1 mark

                  A point on a guitar string S oscillates about its equilibrium position Z in simple harmonic motion.

                  9-1-hl-mcq-medium-1-diagram

                  The amplitude of the oscillation is YZ.

                  Which positions show when the acceleration of point S is at a maximum and the velocity of point S is at zero?

                   

                  Acceleration

                  Velocity

                  A.

                  Z

                  Y

                  B.

                  Y

                  Y

                  C.

                  Z Z

                  D.

                  Y

                  Z

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                    2
                    Sme Calculator
                    1 mark

                    A simple pendulum and a mass-spring system oscillate about their equilibrium positions with simple harmonic motion. On Earth, the period of the oscillations is T. The pendulum and the mass-spring system are taken to Mars where the acceleration of free fall is smaller than on Earth.

                    Which answer best describes the period of the pendulum and the mass-spring system on Mars?

                     

                    Simple Pendulum

                    Mass-spring System

                    A.

                    T

                    Greater than T

                    B.

                    T

                    T

                    C.

                    Greater than T Greater than T

                    D.

                    Greater than T

                    T

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                      3
                      Sme Calculator
                      1 mark

                      Choose the correct statement describing the quantities that remain constant for an object in SHM.

                      • Frequency, f.

                      • Frequency, f, & period, T.

                      • Period, T, & the spring constant, k.

                      • Period, T, frequency, f, spring constant, k, & acceleration of freefall, g.

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                      4
                      Sme Calculator
                      1 mark

                      Which of the following is a correct arrangement for the maximum displacement of a particle performing simple harmonic motion?

                      • x subscript 0 = −fraction numerator a subscript m a x end subscript space f squared over denominator 4 straight pi squared end fraction

                      • x subscript 0 = −fraction numerator a subscript m a x end subscript over denominator 2 straight pi f squared end fraction

                      • x subscript 0 = −fraction numerator a subscript m a x end subscript over denominator 4 straight pi squared T squared end fraction

                      • x subscript 0 = −fraction numerator a subscript m a x end subscript T squared over denominator 4 straight pi squared end fraction

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                      5
                      Sme Calculator
                      1 mark

                      An ion in a crystal lattice structure oscillates with simple harmonic motion. The period of the oscillation is T. T is measured from equilibrium.

                      Which graph shows the change in kinetic energy of the ion from time t = 0 to tT over 2?

                      9-1-hl-mcq-medium-m7-question-stem

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                        6
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                        1 mark

                        A simple pendulum performs simple harmonic motion. The pendulum bob has a mass m, the string has a length l, and the pendulum has a period T

                        Which is the correct value for the period T if the mass of the pendulum bob is doubled and the length of the string is halved?

                        • 1.4 T

                        • 0.7 T

                        • 0.5 T

                        • 0.25 T

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                        7
                        Sme Calculator
                        1 mark

                        A mass-spring system oscillates about its equilibrium position in simple harmonic motion. A bulb on the motion sensor lights up each time the block passes the equilibrium position.

                        9-1-hl-mcq-m9-question-stem

                        The block has a mass m and oscillates with a period T

                        Select the new mass that would cause the period to double.

                        • 0.5m

                        • 1.4m

                        • 2m

                        • 4m

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                        8
                        Sme Calculator
                        1 mark

                        A simple pendulum oscillates with simple harmonic motion as shown.

                        9-1-hl-mcq-medium-m10-question-stem

                        At which positions are the acceleration at zero, the displacement at a negative maximum, and velocity at a maximum?

                         

                        Acceleration

                        Displacement

                        Velocity

                        A.

                        Z

                        Y

                        X

                        B.

                        Y

                        X

                        Y

                        C.

                        X Z Z

                        D.

                        Y

                        X

                        Z

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                          9
                          Sme Calculator
                          1 mark

                          Which line identifies quantities which always have opposite directions during simple harmonic motion?

                          • Acceleration and displacement

                          • Acceleration and velocity

                          • Velocity and restoring force

                          • Acceleration and restoring force

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                          10
                          Sme Calculator
                          1 mark

                          A particle, P, oscillates on the line XZ about its equilibrium point Y, in simple harmonic motion.

                          At the point shown, which statement could be correct about the motion of the particle?

                          q4_4-1_mcq_medium_ib-physics-sl

                          • It has maximum kinetic energy and minimum potential energy

                          • The total energy is equal to the kinetic energy at X

                          • The restoring force is towards Z and the particle is accelerating

                          • The restoring force is towards X and the particle is accelerating

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                          11
                          Sme Calculator
                          1 mark

                          A pendulum is undergoing simple harmonic motion with a time period T and angular frequency ω.

                          A student makes a change to the set up so that the pendulum has a new time period 3T.

                          What is the new angular frequency?

                          • 6ω

                          • 3ω

                          • omega over 3

                          • omega over 6

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                          12
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                          1 mark

                          A pendulum is made to swing by a student pulling the bob to the left and releasing it. The student is careful to displace the bob by only a small amount.

                          After two full oscillations, the motion of the pendulum is plotted on a graph.

                          At which point is the velocity of the bob towards the right?

                          q6_4-1_mcq_medium_ib-physics-sl

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                            13
                            Sme Calculator
                            1 mark

                            Which of the following graphs shows the variation with displacement x of the speed v of a particle performing simple harmonic motion?

                            q8_4-1_mcq_medium_ib-physics-sl

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                              14
                              Sme Calculator
                              1 mark

                              Which graph correctly represents the relationship between acceleration, a, and displacement, x, in simple harmonic motion? q9_4-1_mcq_medium_ib-physics-sl

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                                15
                                Sme Calculator
                                1 mark

                                The graph shows the motion of an oscillating body.

                                 q10_4-1_mcq_medium_ib-physics-sl

                                What is the frequency of the oscillation?

                                • fraction numerator 1 over denominator 7.5 end fractionHz

                                • 7.5 Hz

                                • fraction numerator 1 over denominator 8.0 end fractionHz

                                • 3.5 Hz

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                                1
                                Sme Calculator
                                1 mark

                                The following graph shows the acceleration as a function of time for a simple pendulum oscillating isochronously. 

                                gz4QtOVG_9-1-ib-hl-hmcq-2-q-stem

                                Which of the following gives the times at which kinetic energy is at a maximum?

                                • T over 2 comma space T

                                • T over 4 comma space fraction numerator 3 T over denominator 2 end fraction

                                • T over 4 comma space T over 2

                                • fraction numerator 3 T over denominator 2 end fraction comma space T

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                                2
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                                1 mark

                                A mass-spring system is set up horizontally on a frictionless surface. The spring is extended to the left and released so that the mass oscillates in SHM.

                                Taking motion to the left to be positive, which of the following statements is correct about the motion of the mass?

                                • At fraction numerator 3 T over denominator 2 end fraction, velocity = − maximum

                                • At T over 2, acceleration = − maximum

                                • At T over 4, Potential Energy = maximum

                                • At T, Acceleration = − maximum

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                                3
                                Sme Calculator
                                1 mark

                                An object oscillates about its equilibrium position periodically. It has a total energy E and period T. The amplitude is reduced to one quarter of the original amplitude.

                                What is the new total energy and period of the system?

                                 

                                 

                                Total energy

                                Period

                                A.

                                E over 16

                                T over 4

                                B.

                                E over 8

                                T over 2

                                C.

                                E over 16 T

                                D.

                                E over 4

                                4 T

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                                  4
                                  Sme Calculator
                                  1 mark

                                  A simple pendulum and a mass-spring system are set up such that the period of the oscillations are equal. The mass of the pendulum and the mass-spring system are initially identical. The set-up is repeated but this time the masses of both systems are reduced by three quarters.

                                  What is the ratio of the time period of the pendulum to the time period of the mass-spring system after the masses have been changed?

                                  • 1 half

                                  • fraction numerator square root of 3 over denominator 2 end fraction

                                  • fraction numerator 2 square root of 3 over denominator 3 end fraction

                                  • 2

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                                  5
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                                  1 mark

                                  A simple pendulum oscillates with a time period T near the surface of the Earth. The same pendulum is moved to the surface of the Moon where the acceleration of free fall is 0.2 g.

                                  What is the best estimate for the value of T for the pendulum near the surface of the moon?

                                  • 0.2 T

                                  • 0.4 T

                                  • 1.4 T

                                  • 2.2 T

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                                  6
                                  Sme Calculator
                                  1 mark

                                  A body of mass 0.40 kg is subjected to a force F which varies with its displacement x from a fixed point as shown in the graph below.

                                  xiderTJz_9-1-ib-hl-hmcq-7-q-stem

                                  What is the maximum velocity of the body?

                                  • 1.6 m s−1

                                  • 2.2 m s−1

                                  • 2.8 m s−1

                                  • 3.4 m s−1

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                                  7
                                  Sme Calculator
                                  1 mark

                                  The table below shows the values for the acceleration and displacement of a particle moving isochronously.

                                   

                                  a (mm s−2)

                                  16

                                  8

                                  0

                                  − 8

                                  − 16

                                  x (mm)

                                  − 4

                                  − 2

                                  0

                                  2

                                  4

                                   

                                  What is the period of the motion?

                                  • 2 over straight pis

                                  • straight pi s

                                  • 2 straight pi s

                                  • straight pi squared s

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                                  8
                                  Sme Calculator
                                  1 mark

                                  A pendulum bob is suspended by a thread. The bob is moved to the right and released so that the pendulum oscillates isochronously. 

                                  Taking motion to the left to be positive, which of the following statements is incorrect about the motion of the pendulum?

                                  • The potential energy of the system will reach its maximum value three times in one oscillation

                                  • At T over 4 the kinetic energy of the system is at its maximum value and the velocity is maximum in the positive direction

                                  • At fraction numerator 3 T over denominator 4 end fraction the kinetic energy of the system is at a maximum and the velocity is at a maximum in the negative direction

                                  • At T over 2, the force is acting in the negative direction and the kinetic energy is at its maximum value

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                                  9
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                                  1 mark

                                  When an object oscillates in simple harmonic motion, a restoring force acts toward the equilibrium position.

                                  Which graph shows the restoring force, F, as a function of displacement, x?

                                  4-1-sl-mcq-hard-q1-phy

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                                    10
                                    Sme Calculator
                                    1 mark

                                    The graph below shows the displacement as a function of time for a particle in SHM.

                                    4-1-sl-mcq-hard-q2-phy

                                    At certain points in the oscillation, the acceleration and velocity act in opposite directions. 

                                    Which letter indicates such a point?

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                                      11
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                                      1 mark

                                      A mass is attached to a spring from above and the spring is secured to a clamp. The mass is pulled down and released resulting in a simple harmonic oscillation. 

                                      Which one of the following statements is true?

                                      • The tension, T, in the spring is at a minimum as the mass passes through the equilibrium position 

                                      • The total potential energy, EP, in the system is at a maximum when the mass is at the highest point of its oscillation

                                      • The acceleration, a, of the mass is at a maximum as it passes through the equilibrium position

                                      • The kinetic energy, EK, is at a minimum when the mass is at the lowest point in its oscillation

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                                      12
                                      Sme Calculator
                                      1 mark

                                      A pendulum bob on a string oscillates in SHM with a frequency, f

                                      The period, T, of a simple pendulum is related to the length of the string, l, and the acceleration of free fall, g, by the following equation:

                                       T space equals space 2 straight pi square root of l over g end root

                                      What would the ratio be of the original frequency to the new frequency if the length of the string was increased by a factor of 4?

                                      • fraction numerator 1 over denominator square root of 2 end fraction

                                      • 1 half

                                      • square root of 2

                                      • 4

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                                      13
                                      Sme Calculator
                                      1 mark

                                      A simple pendulum oscillates in SHM.

                                      9-1-hl-mcq-medium-m10-question-stem

                                      Which row correctly describes the force, F, acceleration, a, and velocity, v, at position Y?

                                       

                                      Force

                                      Acceleration

                                      Velocity

                                      A.

                                      zero

                                      zero

                                      max

                                      B.

                                      max

                                      max

                                      zero

                                      C.

                                      max zero max

                                      D.

                                      zero

                                      max

                                      zero

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                                        14
                                        Sme Calculator
                                        1 mark

                                        A mass spring system is set up so that the mass glides on a frictionless surface between two springs on a horizontal bench. The mass-spring system performs SHM

                                        Which of the following statements is true?

                                        • As the mass oscillates about the equilibrium position, the kinetic energy of the mass is zero when the displacement from equilibrium is zero

                                        • As the mass oscillates about the equilibrium position, the kinetic energy of the mass is zero when the restoring force acting on the mass is zero

                                        • As the mass oscillates about the equilibrium position, the potential energy of the spring is at a maximum when the kinetic energy of the mass is zero

                                        • As the mass oscillates about the equilibrium position, the potential energy of the mass is at a maximum when the acceleration of the mass is zero 

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                                        15
                                        Sme Calculator
                                        1 mark

                                        A mass-spring system has a period, T, mass, m, and a spring constant, k. These quantities are related by the following equation:

                                         T space equals space 2 straight pi square root of m over k end root

                                        A new spring has a spring constant of 3 times the original value.

                                        Using this new spring, which mass would cause the period, T, to decrease by a factor of 6?

                                        • 1 over 6 m

                                        • 1 third m

                                        • 8 m

                                        • 1 over 12 m

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                                        16
                                        Sme Calculator
                                        1 mark

                                        The graph below shows the kinetic energy of a simple pendulum as a function of time. The time period of the pendulum is T

                                        What does the length of the line JK represent?

                                        4-1-sl-mcq-hard-q9-phy

                                        • T over 4

                                        • T over 2

                                        • T

                                        • 2T

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                                        17
                                        Sme Calculator
                                        1 mark

                                        The period, T, of a simple pendulum depends upon the length of the string, l, and the acceleration of free fall, g, as defined by the following equation:

                                         T space equals space 2 straight pi square root of l over g end root

                                        If the length of the string was reduced by a factor of 5, what would be the resulting period of the new oscillator?

                                        • 0.2T

                                        • 0.45T

                                        • 2T

                                        • 8T

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