Question

A force of 20N acts on a body for 5 seconds . What could be the change of momentum of the body?

Answer 1

Answer:

Change in momentum is 4 newton

Answer 2

Given :

Force (F) = 20 N

Time (T) = 5 sec

To Find :

The change of momentum of the body

Solution :

According to Newton's second law of motion,

    Force (F) = Rate of change of momentum

∴ The force acting on the body = Rate of change of momentum

⇒                  20                            =  $\frac{Change of Momentum}{Time}$

⇒                  20                            = $\frac{Change of Momentum}{5}$

∴          Change of momentum   =   100 N. sec

Therefore, the change of momentum of the body is found to be 100 N. sec