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A bullet of mass m travelling with a spe...

A bullet of mass m travelling with a speed v hits a block of mass M initially at rest and gets embedded in it. The combined system is free to move and there is no other force acting on the system. The heat generated in the process will be

A

zero

B

`(mv^(2))/(2)`

C

`( M mv^(2))/(2(M-m))`

D

`(m Mv^(2))/(2(M + m))`

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