1) Friction tends to waste energy.2) The wasted energy gets converted into heat, which may be harmful in some cases - or special measures may have to be taken, to get rid of such waste heat.
Lubrication, is one way.Two ways to reduce friction are :.Lose weight.Wet the surface
friction \
A lubricant such as oil and ball bearings are just (2) methods of reducing friction.
The two ways that friction is harmful is that it causes wear and tear of the parts and there is also causes abrasion on surfaces. However, frictions is also useful in various ways like braking when riding a bike and so on.In elevator systems, it is harmful to motor and machine bearings, causes wear. on elevator rails that elevator rides on ,the guide shoes wear and need constant lubrication, unless they use more modern roller guides.
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fricton is useful in many many ways: help in protecting from slipping protect the car from sliding due to friction you can make fire from rubbing two stones. etc......... etc....
Okay 2 ways for the friction to increase is speed and non lubricant
Lubrication, is one way.Two ways to reduce friction are :.Lose weight.Wet the surface
friction \
movement and heat
Rougher surface and more weight to the object increases friction
The two ways that friction is harmful is that it causes wear and tear of the parts and there is also causes abrasion on surfaces. However, frictions is also useful in various ways like braking when riding a bike and so on.In elevator systems, it is harmful to motor and machine bearings, causes wear. on elevator rails that elevator rides on ,the guide shoes wear and need constant lubrication, unless they use more modern roller guides.
A lubricant such as oil and ball bearings are just (2) methods of reducing friction.
1. By friction. 2. by magnetism
Thank you
Friction is greatest in the absent of lubrication. This happens when two objects rub against each other and this might be useful or harmful depending on the set up.
1. when walking so you do not slip everywhere 2. driving (same reason)