Question

A heavy weight is suspended from a spring . A person raises the weight till the spring becomes slack . The done by him is `W`. The energy stored in the stretched spring was `E` . What will be the gain in gravitational potential energy?
A. (a) W
B. (b) E
C. (c) `W+E`
D. (d) `W-E`

Answer 1

Correct Answer - C
Total gravitational energy gained is work done +energy released by the spring `=W+E`