Question

It is easier to roll a barrel than to pull it along the road. Why?

Answer 1

Step 1: Given

It is easier to roll a barrel than to pull it along the road.

Step 2: Finding the reason

1. Because rolling friction is less than sliding friction, rolling a barrel is easier than pulling it along the road.
2. When a body is rolling, the friction acting on it is less than when it is sliding.
3. The rolling friction is less than the sliding friction.