1.

A gun fires a small bullet with kinetic energy K. Then kinetic energy of the gun while recoiling is

Answer»

K
more than K
less than K.
`sqrtK`

SOLUTION :Momentum of Gun in BACKWARD direction is equal tomomentum of BULLET in forward direction.
`i.e. MV = - mv`
Now K.E. of bullet `E = ((-mupsilon)^(2))/(2m)`
and K.E. of Gun `E.=((Mupsilon)^(2))/(2M)=((mupsilon)^(2))/(2M)`
`:.` Since `Mgtm`
.Kinetic energy of Gun is less than K.E. of bullet.


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