A mass on a spring undergoes SHM. When the mass passes through the equilibrium position, which of the following statements about it are true? (There could be more than one correct choice.)
A) Its kinetic energy is a maximum.
B) Its total mechanical energy is zero.
C) Its elastic potential energy is zero.
D) Its acceleration is zero.
E) Its speed is zero.

Question

Quizplus · Accepted Answer

At the equilibrium position, the mass has maximum kinetic energy because it is at its maximum speed (A), its elastic potential energy is zero because the spring is neither compressed nor stretched (C), and its acceleration is zero because it is at the point where the force on it changes direction (D).

A Mass on a Spring Undergoes SHM