Question

is friction both good and evil

Answer 1

$\mathfrak{\large{\underline{\underline{Answer :-}}}}$

The force which opposes the motion of a body while moving on a surface is called force of friction.

• Friction saves us from slipping on a smooth and slippery surface.

• The friction between the tyres of vehicles and the ground helps vehicles to move without slipping.

• Shoes of sportsmen are provided with spikes so that they get a better grip on the ground and prevent themselves from slipping.

• Grooves in tyres increase the friction and the vehicles get a better grip on the road.

• The brakes of any moving vehicle depend upon friction. When we apply brakes, the vehicle slows due to the force of friction between the brake lining and the drum of the wheel.

• When we strike a matchstick it catches fire. The force of friction raises the temperature of the match head to such an extent that the chemicals in it catch fire.

• So you see how friction plays an important role in our daily life.

• But at the same time, an increase in friction results in the loss of energy and wear and tear of the surfaces.

• As rubbing of our palms against each other generates heat due to friction, similarly when moving parts of a machine are rubbed together, a lot of heat is produced due to the friction between them.

• This heat may damage the machine gradually.

• The eraser gets smaller with constant use. The eraser experiences friction when we rub it against a paper, causing it to wear out with time.

• Friction also causes wear and tear of the parts of the machines in contact, thus reducing the life of the machines.

• Friction helps us to walk run and play but gradually, this same friction wears out the soles of our shoes.

• Friction also makes moving or sliding heavy objects difficult as a lot of energy is utilised in overcoming friction.

• Friction, though necessary, is undesirable too ; thus it is referred to as a Necessary Evil

Answer 2

$\huge{\underline{\underline{\boxed{\sf{\purple{Answer ࿐}}}}}}$

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Friction saves us from slipping on a smooth and slippery surface.

• The friction between the tyres of vehicles and the ground helps vehicles to move without slipping.

• Shoes of sportsmen are provided with spikes so that they get a better grip on the ground and prevent themselves from slipping.

• Grooves in tyres increase the friction and the vehicles get a better grip on the road.

• The brakes of any moving vehicle depend upon friction. When we apply brakes, the vehicle slows due to the force of friction between the brake lining and the drum of the wheel.

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