Question

A block of mass 1 kg moving under the effect of a horizontal force changes its speed from 2m per sec to 10 m per sec, the work done by the applied force is:

Answer 1

m=1kg

u =2m/s

v=10m/s

ke=1/2m v^2

=1/2×1×(10-2)^2

=1/2×64

=32 J

W=32J