Question

Write two positive and two negative effects of friction. (4 marks)

please write with detail, if correct answer I will mark you the brainliest

Answer 1

Answer:

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.

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.

Answer 2

Answer :-

↪ Positive effects of friction :-

1. Helps us to walk properly on land.
2. Nails can be fixed in a wall due to friction.
3. It enables to slow down vehicles without skidding.
4. It enables us to write with chalk on black board.

↪ Negative effects of friction :-

1. Friction wears out the soles of shoes.
2. Causes wear and tear of machines.
3. Forest fires are caused due to friction due to the heat, friction produced between the branches.
4. It opposes the motion, so extra energy is required to overcome.