Question

How is friction harmful?

Answer 1

Below is a list of friction's negative impacts:

1. A lot of heat is generated by friction in various mechanical parts, which wastes energy as heat.
2. Restricts motion, requiring more energy to overcome it.
3. Making noise while operating a machine wastes energy and is annoying.
4. Friction between tree branches is what ignites forest fires.
5. Using techniques like greasing and oiling to combat friction and the regular wear and tear caused by it costs a lot of time and money.