Question

explain advantages and disadvantages of friction and motion the methods to decrease friction​

Answer 1

Explanation:

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.

The force of friction is the force that depends at the surface of contact of two bodies and opposes their relative motion. ... Friction is usually called a necessary evil. It means that it is essential in games and sports. Without friction we cannot give a better performance in the field of sports.

Answer 2

Answer:

advantages of friction

• 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

• Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.
• Opposes motion, hence more energy is needed to overcome friction.
• Noise production in machines is irritating as well as leads to energy loss.
• Forest fires are caused due to friction between branches of trees.

methods to decrease friction​

• applying grease oil or any lubricants
• polishing the surface
• using ball rearings
• by streamlining