The potential energy of a spring is 0.3 J when it is compressed 0.04 m to the left of its equilibrium position. At this point it comes to its leftmost position. What is its kinetic energy when it returns to the equilibrium point?
A) 0.25 J and moving to the right
B) zero
C) -0.25 J and moving to the left
D) 0.25 J and at rest.
Fill in the Blank Questions

Question

Quizplus · Accepted Answer

The potential energy at the equilibrium point is zero because the spring is neither compressed nor stretched. The kinetic energy of the spring at the equilibrium point equals the initial potential energy (0.3 J) because of the conservation of mechanical energy. The spring is moving to the right as it returns to the equilibrium position from being compressed to the left.

The Potential Energy of a Spring Is 0