question_answer

A ball is dropped from a height A on a floor of coefficient of restitution. The total distance covered by the ball just before second hit is

A) \[\text{S}0\]                                     

B) \[\text{Si}\text{F}\]

C) \[\text{P}\text{Cl}\]    

D) \[O_{2}^{+}\]

Correct Answer: C

Solution :

     Total distance travelled by the ball before its second hit is \[F=\frac{k}{v}\] \[v=\sqrt{\frac{2kt}{m}}\]                            \[F=\frac{k}{\sqrt{\frac{2kt}{m}}}or\,F\propto {{t}^{\frac{-1}{2}}}\]