Question

A car increases its speed from 12 m/s to 25 m/s in a time of 8.0 seconds. Determine (a) the constant acceleration of the car and (b) the force acting on the engine, in Newtons (N), if its mass is 1100 kg.

Answer 1

Part (a)

`a=(\Delta v)/(\Delta t)=(25-12)/(8)=1.6\text{ m/s}^2`

Part (b)

`F=ma=(1100)(1.6)=1800\text{ N}`