Question

When a force applied to a body of mass 1 kg it's velocity changes from 10m/s to 20m/s in 2 sec. The rate of change of momentum of the body is:
A) 5N
B) 20N
C) 10N
D) zero

Answer 1

the answer is c 20 N MAYBEE CORRECT

Answer 2

Rate of change in momentum is =change in momentum/time.
So here change in momentum is m(v-u)=1(20-10)=10kgm/s
So rate of change will be 10/time=10/2=5kgm/s^2 or 5N.

So the answer is a.

Thanks.
Tripathy