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.
Friction is useful in helping cars stop when brakes are applied, as the friction between the brake pads and the wheels slows down the vehicle. Friction is also beneficial in walking, as friction between the soles of shoes and the ground prevents slipping and provides traction.
You can increase friction by increasing the roughness of a surface or by increasing the force pushing the surfaces together. You can decrease friction by using lubricants or reducing the contact area between the surfaces.
Two ways to reduce friction are to use lubricants, such as oil or grease, to create a smooth surface between moving parts. Another way is to use ball bearings or rollers to minimize the surface area in contact and reduce 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.
Friction can be measured using instruments like a spring scale to measure force required to overcome friction, or a friction tester to measure coefficient of friction between two surfaces. Friction can also be estimated by analyzing the wear patterns on surfaces or by calculating the energy lost due to friction during motion.
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
movement and heat
Rougher surface and more weight to the object increases friction
1. By friction. 2. by magnetism
Friction is useful in helping cars stop when brakes are applied, as the friction between the brake pads and the wheels slows down the vehicle. Friction is also beneficial in walking, as friction between the soles of shoes and the ground prevents slipping and provides traction.
You can increase friction by increasing the roughness of a surface or by increasing the force pushing the surfaces together. You can decrease friction by using lubricants or reducing the contact area between the surfaces.
These came of of the top of my head so here it is it can be used to produce heat or to slow things down in the air. Hope this helped:)
Electrical charges can be transfered through friction and contract.
this site isn't useful
Two ways to reduce friction are to use lubricants, such as oil or grease, to create a smooth surface between moving parts. Another way is to use ball bearings or rollers to minimize the surface area in contact and reduce friction.
See its like somebody giving you a bad idea about something. when it really isnt okay