Wave Behavior C.1 Simple Harmonic Motion (id: c69056de7)

本题目来源于试卷: Wave Behavior C.1 Simple Harmonic Motion，类别为 IB物理学

[单选题]
Two identical objectse5 ;w59cowbml0vf0 koju4h298kyoqn P an.r) iof)s3 m7fq fs.qvd Q are connected to identical springs. Both P and Q are performing simple harmonic motion (SHM)fff7msq .)q so .v)r3i around equilibrium level O.


The diagram shows positions of P and Q at time $t=0$. Which graph shows how kinetic energy of P and Q vary with time t?

A.
B.
C.
D.


参考答案:  A


本题详细解析:
Explanation:

Potential energy is in its maximum value at boundaries (extreme points), kinetic energy at a maximum value at equilibrium point. So at $t=0$, for P kinetic energy is a maximum, for Q potential energy is a maximum but kinetic energy is zero. For both masses, the kinetic energy will maximise every half cycle.

At $t=\frac{T}{2}​$ again for P kinetic energy is a maximum, for Q potential energy is a maximum.

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