Question

a bullet of mass 4gm when fired with a velocity of 50m/s, it entered in to a wall to a depth of 10cm. How much will be the average resistance offered by the wall.?

Answer 1

given,
mass=4g
velocity=50m/s
we know that,
momentum=mass × velocity
therefore,
     momentum=4 × 50
                       =200m/sec
now,after converting gram into kg the answer will be 0.2 kg m/sec