1.

A ball is dropped vertically from a height of h onto a hard surface.If the ball rebounds from the surface with a fraction r of the speed with which it strikes the latter on each impact, what is the net distance traveled by the ball up to the 10^(th) impact ?

Answer»

`2H(1-r^(10))/(1-r)`
`H(1-r^(20))/(1-r^(2))`
`2h(1-r^(22))/(1-r^(2))-h`
`2h(1-r^(20))/(1-r^(2))-h`

Answer :D


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