Question

what type of energy is gained by a stretched rubber band and how

Answer 1

1. when the rubber band is stretched we know that the rubber band would gain the energy called " potential energy ". we know that a object would gain potential energy because of its shape or position because there is a temporary change in its shape. 

2. when we release the rubber band back then the rubber band would gain the kinetic energy. we know that kinetic energy is gained by a object due to it's motion. 

3. this total stretching and the coming back to it's normal position the rubber would gain it's mechanical energy.
⇒ potential energy + kinetic energy = mechanical energy