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dp86
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Does heat have any effect on friction in any other way than in lubricated friction when considering the three states of matter?
Thanks,
Any help will be appreciated!
Thanks,
Any help will be appreciated!
Kinetic (dynamic) friction in some cases increases with heat. Take for instance brake pad material in some racing applications. It's fairly common for the driver to have to get heat into the brakes before they work at an optimal level.rcgldr said:Depending on the material, kinetic (dynamic) friction decrease once temperature exceeds some level. This is why overheated brakes can fade, why overheated clutches can slip, and why overheated tires slide easier than cool tires.
There's an optimal range of temperature that varies depending on the material. If below the optimal temperature range, then heat will improve friction, if above the optimal range, then more heat will degrade friction. Once within the optimal temperature range, then the ideal situation would be to dissipate heat at the same rate it's generated (on average) so that temperature remains within the optimal range.dp86 said:But generally speaking, does heat reduce or increase the coefficient of friction?
SammyS said:Kinetic (dynamic) friction in some cases increases with heat. Take for instance brake pad material in some racing applications. It's fairly common for the driver to have to get heat into the brakes before they work at an optimal level.
Operator said:Same goes with tires, which is why drag racers do burn-outs before a race. That's not just for show, the heat makes the rubber a more sticky.
Friction is a force that opposes the motion of two surfaces that are in contact with each other.
Yes, friction is affected by temperature. As temperature increases, the molecules in an object vibrate more, causing an increase in surface roughness and therefore an increase in friction.
Heat causes an increase in surface roughness, which in turn increases the force of friction. This is because the molecules in an object become more mobile and can create more contact points with the other surface, resulting in a greater resistance to motion.
No, not always. The effect of heat on friction depends on the materials involved. In some cases, an increase in temperature can actually decrease friction, such as with certain types of lubricants.
Yes, in some situations, friction can be controlled by heat. For example, in metalworking, heat can be used to soften the material and make it easier to shape, reducing friction. However, in most cases, the effect of heat on friction is not controllable and is a natural result of the materials and their properties.