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A cannon-ball is fired with a speed 50 m...

A cannon-ball is fired with a speed `50 m//sec` with respect to ground from one end of a stationary railroad car which rests on a smooth track. The ball collides with opposite wall and stops. How much distance did the railroad car cover just before the collision? Given that the ratio of the mass of the ball to that of the railroad car is `1//99` and the length of the car is `50m`

A

`2 m`

B

`(1)/(2) m`

C

`0 m`

D

cannot be calculated from acts

Text Solution

Verified by Experts

The correct Answer is:
B
CM will be at rest, `m(50-x) =99 m(x)`
`rArr x=(1)/(2)m`
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