a bulletA bullet of mass 30g strikes a target with velocity of 90 m/s and is brought to rest after penetrating 15cm into it . Calculate work done by the bullet
Answers
Answered by
5
Explanation:
work done=change in kinetic energy
K.E=1÷2mv^2
=1÷2m×v×v×m÷m
=1÷2p^2÷m ( since,p=mv)
=p^2÷2m
p=mv
=30÷1000×90
=2.7kg.m/s
work done =p^2÷2m
=(2.7)^2÷2×0.03
=121.5j
Similar questions