Below is a diagram of a weight on a spring. when the weight is pulled down and then released the spring compresses and expands. each position indicates a different point in time.
a. in all four positions mechanical energy is 0 j
b. the elastic potential energy of the spring at position 2 is converted to kinetic energy
c. the chemical potential energy of the spring is greatest at position 4
d. in all four positions, the gravitational potential energy of the spring is the same