Question

Write down 5 merits and 3 demerits of friction​

Answer 1

Answer:

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

Explanation:

Friction enables us to walk without slipping.

It enables a car to move on road without skidding.

It enables us to apply brakes and slow down or stop a moving car.

It enables us to write and draw on paper.

It enables us to pick up and hold things in our hands.

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Answer 2

Answer:

Your answer is:-

Explanation:

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.

• It helps in the generation of heat when we rub our hands.

Disadvantages of Friction:

• Friction produces unnecessary heat leading to the wastage of energy.

• The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects.

• Forest fires are caused due to the friction between tree branches.

• A lot of money goes into preventing friction and the usual wear and tear caused by it by using techniques like greasing and oiling.