Question

11
Friction : A Necessary
Evil​

Answer 1

Friction is a necessary as-

• It helps us to walk.

• It helps us to write.

• Friction allows things to stop and slow down the speed of the object in motion.

It is an evil as-

• Friction provides an opposing force which tries to slow the object down.
• It wears out tyres and soles of our shoes.
• It produces heat which may damage machines.

Thus, friction is a necessary evil.