Question
A body of mass m falls from height h on ground. If 'e' be the coefficient of restitution of collision between the body and ground, then the distance travelled by body before it comes to rest is
Joshi sir comment
if a body falls from height h then height attained after rebound will be e2h
by using this fact
total distance covered before stop = h+2e2h+2e2e2h+2e2e2e2h+..................................................
so d = h+2e2h[1+e2+e4+e6+.........................]
now solve