Question

Give three examples each where friction is a disadvantage and where it is helpful.

Answer 1

Advantages of friction:

1. Friction helps us to walk without skidding.
2. Without friction, writing on a piece of paper or a black board would not be possible.
3. Friction helps us to apply the brakes on a vehicle.

Disadvantages of friction:

1. Friction causes wear and tear. For example, shoe soles wear out after some time.
2. It produces heat. For example, the engine of a car becomes hot after the vehicle has run for some time.
3. It resists the motion of an object. For example, it slows down the speed of vehicles.