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

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

Step-by-step explanation:

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

`(dP)/(dt)=F\\\\(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