Answer: Consider a ball at rest in the middle of a toy

Solution 11E

Introduction

The ball which is kept inside a toy wagon will move towards the backside of the wagon. But initially the ball and wagon were at rest. So, this can be explained by using Newton’s 1st law of motion very clearly.

Step 1

Representation of toy wagon and ball

Initially the toy wagon was at rest and the ball inside too. It is represented in figure 1.

When the toy wagon moves forward, the ball will move backward and it is shown in figure 2.