Question

Define:
1. Static friction
2. sliding friction and
3. rolling friction.

Answer 1

1. The maximum force exerted by a surface on a body so long as it remains stationary is called the force of static friction.
2. The minimum force required to keep the body moving over a surface such that it moves equal distances in equal intervals of time is called the force of sliding friction.
3. The minimum force required to roll a body on a surface is called the force of rolling friction.