Question

A particle oscillating in simple harmonic motion is: 

A. never in equilibrium because it is in motion 

B. never in equilibrium because there is always a force 

C. in equilibrium at the ends of its path because its velocity is zero there 

D. in equilibrium at the center of its path because the acceleration is zero there 

E. in equilibrium at the ends of its path because the acceleration is zero there 

Answer 1

D. in equilibrium at the center of its path because the acceleration is zero there