Question

what are the merit and dismerit of the frictional force​

Answer 1

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Advantages / Merits of Friction:

of Friction:It helps us walk on the ground. Brakes in a car make use of friction to stop the car. Asteroids are burnt in the atmosphere before reaching Earth due to friction. It helps in the generation of heat when we rub our hands.

Disadvantages/Demerits of friction are :

of friction are :Friction produces heat which damages the moving parts of a machine.Friction produces wear and tear on the contacting surfaces. This reduces the life of machine parts, tyres and shoe soles.A lot of energy is wasted in overcoming the friction before an object starts moving.

Answer 2

Answer:

Advantages of Friction:

Friction is responsible for many types of motion. It helps us walk on the ground. Brakes in a car make use of friction to stop the car. Asteroids are burnt in the atmosphere before reaching Earth due to friction.