Question

Momentum of a body changes from 6 kg m/s to 20 kg m/s in 5 sec. Find average force acting on the body.

Answer 1

Answer:

2.8 N

Explanation:

According to Newton's Second law of Motion, the change in momentum is directly proportional to Force applied

Change in momentum= mv - mu/t

mv = 20 kg m/s

mu= 6 kg m/s

Force= Change in momentum

F=(20-6) kg m/s / 5s

F=14 kg m/s /5s

F= 2.8kg m/ $s^{2}$

F=2.8N