Question

A body of mass 25gm has a momentum of 0.40kgm/s.Find the kinetic energy.

Answer 1

Explanation:

first find the velocity

momentum=mass ×velocity

0.4=0.025×v

v=0.025/0.4

v=16 m/s

next find the kinetic energy

kE=1/2 m v<2

1/2×0.025×16×16

=3.2

Hence tha kinetic energy is 3.2 j