Question

5. Give two advantages of friction.​

Answer 1

Answer:

Advantages of Friction:

1. Friction is responsible for many types of motion.

2. It helps us walk on the ground.

3. Brakes in a car make use of friction to stop the car.

4. Asteroids are burnt in the atmosphere before reaching Earth due to friction.

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

Answer 2

Question

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Why oils are used in machinery?

Answer

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==> So a lubricant is a substance that reduces friction, heat, and wear when introduced as a film between solid surfaces. Using the correct lubricant helps maximize the life of your bearings and machinery, therefore saving money, time, and manpower, thus making operations more efficient and more reliable.

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