# Assume a car and truck are moving with the Impulse same speed of 15 m/s. 1) Calculate momentum of the car of mass 975 kg 2) Calculate momentum of the truck of mass 2675 kg 3) Determine the force =? Needed to stop each in 25 s.

##### 1 Answer

Nov 10, 2015

#### Answer:

#### Explanation:

Momentum = mass x velocity

The acceleration is the change in velocity/time.

Force = mass x acceleration.

So for the 1st truck:

So for the 2nd truck:

The minus sign means this is a braking force.