# What average force is required to stop a 1500 kg car in 9.0 s if the car is traveling at 95 km/h ?

##### 2 Answers

Feb 28, 2018

I got

#### Explanation:

We can use the Impulse-Change in Momentum Theorem:

so we get:

where I changed

#### Explanation:

From Newton's second law of motion,

where F is the force, a is the acceleration and m is the mass

acceleration =

where

and

So,

The minus sign indicates the direction of the force is to the opposite side

*I have converted its speed from