Question

From the above examples, state when you think:
A. Friction is good
B. Friction is bad​

Answer 1

A. Friction is good:

1. The tyres os a car has treads which prevent the slipping of tyres and due to this accidents are less often.
2. Walking on the road is because of the helpful friction between the foot and the road.
3. Writing using pen or pencil is another example of helpful friction.

B. Friction is bad:

1. It causes wear and year of machinery.
2. It causes the shoe soles to wear off.