3. Give two advantage and
disadvantages of friction.
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Advantages :-
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.
Disadvantages:-
It always resists the motion, so extra energy is required to overcome it.
It causes wear and tear of machines.
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