Question

What do you understand by the term Force of friction and state three effects of force of friction?

Answer 1

Force of friction:

1. Friction is a contact force that always opposes the relative motion of two objects which are in contact.
2. Friction is caused by irregularities on the surface of a body.

Effects of friction:

1. Friction causes wear and tear in mechanical parts.
2. Friction Produces heat.
3. We are able to walk because of friction.