A metal ball falls  from a height of 10 metro  on a steel plate and bounces back to a height of 2 .5metre. The coefficient of restitution of the ball is

The velocity with which the ball strikes the ground first timeV=(2gh) The velocity with which it rebouonds V1=ev=e(2gh) fr|e1y 16ing the formula, v2=u2+2gh1, we get  0=e2(2gh)−2gh1  or  c2h=h1 ∴ e=h1/h  or  e=(2⋅5/10)=(0⋅25)=0⋅5