Question

Justify the need of friction force

Answer 1

friction is a necessary evil. -advantages
without friction we can't walk
we can't write with a pen or pencil
lightning of a matchstick is not possible without friction.

disadvantages
applied force is wasted
wearing out of moving parts in a machinery and overheating

Answer 2

Answer:

Explanation:

friction is a necessary evil. -advantages

without friction we can't walk

we can't write with a pen or pencil

lightning of a matchstick is not possible without friction.

disadvantages

applied force is wasted

wearing out of moving parts in a machinery and overheating

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