Question 3
The collar shown in figure below has a mass of 2 kg and can slide without friction on a fixed vertical guide. It is held at the position where $y = 0$. In this position the spring, which has a stiffness of 500 N $m^{-1}$ and a negligible mass, is compressed by 0.1 m.
Find the velocity of the collar when $y = 0.2$ m, if it is released from rest.
0.2 m
y