Question

when a force of 4N acts on a mass of 2kg of a time of 2s. what is the rate of change of momentum?

Answer 1

Since we are looking for the rate of change of momentum, we don't care how long the force acts. The rate of change of momentum will be the same regardless. 

A force of 4N imparts impulse of 4 per second. That is the rate of change of momentum: 4 per second. 

Since the force is acting on a mass of 2, the velocity will increase by 2 m/s every second. You didn't ask for that. It's extra.

Answer 2

Answer:

the answer is 4N but I am not getting it