Question

I am trying to push start a car which has stopped. If the biggest force with which I can push the car is 420N, and the car has a mass of 1025kg, how fast will it be going after 8.0s of pushing?

Answer 1

`v=3.28m/s`

Explanation:

I am going to assume that in this problem there is no friction, however if there was friction, the process would be similar.

What you want to is employ Newton's second law formula:

`F=ma`

You already have your force applied and the mass of the object being moved is given.

`420N=1025kg*a`

`a=.410m/s^2`

If you increase your velocity by `.410m/s` every second, then it follows that you should multiply your acceleration by the time elapsed to find the velocity at 8 seconds.

`v=at`

`v=.410(m/s^2)*8s`

`v=3.28m/s`