Question

a force of 10 Newton acts for 20 seconds on a body of mass 2 kg initially at rest . calculate the energy required by the body & the work done by the applied force

Answer 1

U=0m/s

F=ma

a=F÷m

So,a=10÷1=10

S=ut+1/2 at×t

=1/2 ×10×16

=80

W=FS

10×80

=800J