Question

give at least three examples where friction is useful

Answer 1

1. Writing: If there were no friction, you couldn't write.

2. Walking: You are able to walk due to friction, you push the floor backward and floor in turn push you forward.

3. Taking a circular turn on a plane curved road: Friction acts as a centripetal force which is required to take a circular turn.

4. If there were no friction you would not br able to warm your hands up by rubbing in winters. Such a relief, no?

Answer 2

Answer:

friction between the brake shoes and the wheels shows down or stops moving vehicle