Question

advantages and disadvantages of friction

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Answer 1

Explanation:

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.

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.

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Answer 2

Answer:

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Friction is a force between two surfaces that are sliding, or trying to slide, across each other.

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1.it is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it becomes difficult to walk due to low friction of ice.

2. We can not fix nail in the wood or wall if there is no friction. It is friction which holds the nail.

3. A horse can not pull a cart unless friction furnishes him a secure Foothold.

4. We can write on a paper or on a board.

5. Friction helps in applying the brakes.

$\blue{\huge{\bold{\boxed{\green{\boxed{\purple{\underline{DISADVANTAGE}}}}}}}}$

1.The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy.

2. Due to friction we have to exert more power in machines.

3. It opposes the motion.

4. Due to friction, noise is also produced in machines.

5. Due to friction, engines of automobiles consume more fuel which is a money loss.

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