Question

A car has a mass of 820 kg. It starts from rest and travels 41 m in 3.0 s. What is the net force applied to the car?

Answer 1

`7500N`

Explanation:

`F=ma`

`s=ut+(at^2)/2`
`a=(2(s-ut))/(t^2)=(2(41-0(3)))/(3^2)=82/9=9.dot(1)`

`F=820*9.dot(1)=7471.dot(1)~~7500N`