Question

pls answer the question

Answer 1

Force =change in momentum /time

momentum of gun before firing= 0

moment of gun after firing = momentum of bullet after firing( law of conservation of momentum)

Mass of gun*velocity of gun= mass of bullet * velocity of bullet

MV=m*v

V= m*v/M

=35*10^-3*400/20

=0.7

therefore F= MV/t

=4*20*0.7/1

=56 N