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A railway flat car, whose mass together ...

A railway flat car, whose mass together with the artillery gun is M, moves at a speed V. The gun barrel makes an angle with the horizontal. A shell of mass m leaves the barrel at a speed v, relative to the barrel. The speed of the flat car in order that it may stop after the firing is 

A

`(mv cos alpha)/(M-m)`

B

`(mv)/(M+m)`

C

`(M+m) v cos alpha`

D

`(Mv cos alpha)/(M+m)`

Text Solution

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The correct Answer is:
A
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