Question

List any two advantages and two disadvantages of friction.

Accepted Answer

Advantages of friction:

1. Friction between our feet and the ground makes it possible for us to walk. We find it hard to walk on ice or on a smooth, polished floor as movement across these surfaces produces less friction. That is why we often slip on the icy ground or a wet floor.

2. The friction between the tires of vehicles and the road makes them roll forward. Thus, friction makes the movement of vehicles possible.

Disadvantages of friction:

1. Friction makes it hard to slide heavy objects (such as a heavy piece of furniture or a heavy box) across the floor.

2. Friction generates heat. You can feel it by rubbing your palms together for some time. Heat produced due to friction causes damage to machine parts such as car brakes.

List any two advantages and two disadvantages of friction.

Important Questions on Unit Test Paper 4

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