There are more than two ways. You might need to choose:
ko
it can give us warmth
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.
Lubrication, is one way.Two ways to reduce friction are :.Lose weight.Wet the surface
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.
ko
it can give us warmth
In the bearings and in the tires. All it does there is turn into heat - and we can't use that for going forward.
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.
Lubrication, is one way.Two ways to reduce friction are :.Lose weight.Wet the surface
Okay 2 ways for the friction to increase is speed and non lubricant
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.
its harmful to the engine, but without it your car could not move as the tires would just spin. can't have one without the other although things can be done to reduce it in the engine and increase it at the tires.
friction \
movement and heat
harmful friction is when friction can do harm or be a problem for example of this is if your skiing down a hill with grass you will have to much friction then you fall and get hurt :p
There is friction between the rubber tires and the road or other riding surface.There resistance to the rider moving through the air.The bicycle's chain, pedals, gears, etc all develop frictional forces.