A ball is dropped from a height of 90m onto a horizontal plane rest. Find the total distance travelled by it before coming to rest. The coefficient of restitution e=0.5.

Explanation

Total distance travelled by the ball
`=hxx(1+e^2)/(1-e^2)=90xx(1+(0.5)^2)/(1-(0.5)^2)`
`=90xx(1.25)/(0.75)=150 m`.