Question

N
21 A mass less spring with a force constant K = 40 N/m hangs vertically
from the ceiling. A 0.2 kg block is attached to the free end of the
spring and held in such a position that the spring has its natural
length and suddenly released. The maximum elastic strain energy
stored in the spring is (take g 10m/s2)

Answer 1

Explanation:

answer for it is given above