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 objects P and Q are connected to identical springs.vte45;(lozb j Both P r 8-j1kb: bn luvhuz37and Q are performing simple ru vukbn71zbh 38:-jlharmonic motion (SHM) 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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