# A block of mass ‘m’ initially at rest is dropped from a height ‘h’ on to a spring of force constant K. The maximum compression in the spring is x, then

Q: A block of mass ‘ m ‘ initially at rest is dropped from a height ‘ h ‘ on to a spring of force constant K. The maximum compression in the spring is x , then

(a) $m g h = \frac{1}{2} k x^2$

(b) $m g (h+x) = \frac{1}{2} k x^2$

(c) $m g h = \frac{1}{2} k (x + h)^2$

(d) $m g( h + x) = \frac{1}{2} k (x+h)^2$

Ans: (b)