Question

A 2,000-kg test car, traveling 60 m/s hits a brick wall. Using motion pictures, the time involved is determined to be 0.050 s. What is the change in momentum of the car?

Answer 1

The change in momentum is -120000.

Explanation:

Given : A 2,000-kg test car, traveling 60 m/s hits a brick wall. Using motion pictures, the time involved is determined to be 0.050 s.

To find : What is the change in momentum of the car?

Solution :

The mass of the car is m=2000 kg

The initial velocity of the car is
`V_i=60 m/s`

A car hits the wall,
`V_f=0 m/s`

Change in momentum is
`I=m(V_f-V_i)`

Substitute the value,

`I=2000(0-60)`

`I=-120000`

The change in momentum is -120000.