Question

A body of 10 n acts for 20 sec on a body of mass 2kg find energy required

Answer 1

Answer:

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