A cart attached to a spring vibrates with amplitude A.

(a) What fraction of the total energy of the cart-spring system is elastic potential energy and what fraction is kinetic energy when the cart is at position$x=\frac{A}{2}?$

(b) At what position is the cart when its kinetic energy equals its elastic potential energy?

(a) What fraction of the total energy of the cart-spring system is elastic potential energy and what fraction is kinetic energy when the cart is at position

(b) At what position is the cart when its kinetic energy equals its elastic potential energy?