Question

Give some disadvantages of friction ..in points .....plz fast!!

Answer 1

*Friction consumes a substantial part of the useful energy available to us as friction opposes the relative motion between two objects in contact, some of the effort applied to the moving object is wasted in overcoming friction.

*Friction is responsible for a lot of wear and tear of moving parts/objects.
*We must have seen the workout steps of foot over bridges at railway station or soles of old shoes.

Have you ever wondered what is the cause of these? It is friction which wears out surfaces rubbing against each other. For this very reason the moving parts of old machines need replacements.

* A significant amount of energy, supplied to a machine gets wasted in the form of heat energy while overcoming the force of friction.

* We all have observed that when we strike a matchstick against a rough surface, it catches fire. Also when we vigorously rub our palms together for a few minutes they become warm. This is because friction leads to the production of heat. The energy required to overcome friction is (mainly) converted into heat . While this is welcome for warming up our palms on a winter morning, it becomes a problem between the moving parts of a machine. Excessive heat produced due to friction can damage the moving part of a machine.

Hope this helped!!!!