Question

Write advantages and disadvantages of friction

Answer 1

Answer:

Disadvantages of friction:

It always resists the motion, so extra energy is required to overcome it.

It causes wear and tear of machines.

It decreases the life expectancy of moving parts of vehicles.

Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.

Explanation:

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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.

•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.