Question

friction is essential and evil why

Answer 1

Friction is essential :

1. To walk, To drive a car, roll.

2. To control speed of vehicles, bouncing balls.

3. To operate screws, blots, harnesses, writing.

4. To have a nature free from violent storms, tsunamis, noise and chaos.

Friction is evil:

1. It wastes a lot of energy, decreases efficiency of vehicles.

2. It generates heat and destroy machines.

3. It leads to rashes to your skin when we fall.

4. All forms of motion in contact with other bodies needs a constant force and thus work is done at every step.

5. For physicists it increases the complexity of calculations.

Hope this helps
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