Question

A force of 10 N acts for 20 second on a body of mass 2 kg initially at rest. Calculate the energy required
by the body and the work done by the applied force.
​

Answer 1

Answer:

100 kg-m/s

F=10N,m=20kg,t=10s

a=

m

F

=

20

10

=0.5m/s

2

v=u+at=0+0.5×10=5m/s

Change in momentum =m(v−u)=20(5−0)=100kgm/s

Answer 2

Answer:

I don't no bro sorry which class