How can you prove that the potential energy of a stretched spring turns into kinetic energy when you release the spring?

Potential energy+Kinetic energy=Total energy

When you release a spring the velocity increases, therefore the kinetic energy increases ke=1/2*mv^2 and the displacement decreases therefore the potential energy decreases pe=1/2*kx^2.

what question you dont ask a question

explanation:

the answer is b, have negligible mass