A) 800 N
B) (6) 1000 N
C) 1200 N
D) 2400 N
E) None of these
Correct Answer: E
Solution :
Momentum of the gun after firing each bullet is. On firing n bullets per second, rate of change of momentum of the gun, \[i.e.,\] force experienced by the gun in backwards direction\[=mnv\]. This is also equal to the force necessary to hold the gun in position. \[\therefore \] \[F=15\times {{10}^{-2}}\times 8\times {{10}^{2}}\times 20\] \[=24\,\,N\] The question reads \[29\] bullets. Hence cancelled.
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