Laws Of Motion Question 255

Question: N bullets each of mass m kg are fired with a velocity vms1 at the rate of n bullets per second upon a wall. The reaction offered by the wall to the bullets is given by

Options:

A) nmv

B) Nmvn

C) nNmv

D) nNvm

Show Answer

Answer:

Correct Answer: A

Solution:

Total mass of bullets = Nm, time t=Nn

Momentum of the bullets striking the wall = Nmv Rate of change of momentum (Force) = Nmvt = nmv.



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