Question

A 1500.0 kg car hits a brick wall with a force of 60.0 N in 1.75 seconds. What is the change in the momentum of the car?

Answer 1

change in momentum equal to impulse delivered. car delivers impulse so loses momentum.

impulse ..
60N x 1.75sec = 105 kg-m/sec

Answer 2

Answer:

Change in the momentum of the car = 105 kgm/s

Explanation:

We have the Newton's second law, that is rate of change of momentum is force.

      $\frac{dP}{dt}=F\\\\\frac{mv-mu}{dt}=F\\\\mv-mu=Fdt$

That is rate of change of momentum is impulse.

Here we need to find rate of change of momentum = Fdt

           dP = Fdt

            dP = 60 x 1.75 = 105 kgm/s

Change in the momentum of the car = 105 kgm/s