Question

A force of 20 N gives a ball an acceleration of 4.0 m/s^2 on a level frictionless surface. What is the mass of the ball?

Answer 1

This is based on Newton's 2nd Law, F = ma

Explanation:

The 20N is the force. You know that because force is measured in Newtons, which is `{kg*m}/{s^2}`

So, `20N = mass*4m/s^2`

This obviously gives a mass of 5 kg