Is it true that friction produces heat?

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True

False

answer is A.

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Detailed Solution

The above statement is true.
The frictional force prevents an object from moving about the surface with which it is in touch. Friction relies upon the nature of the surface. If the surface is rough, then friction between the object and the surface is high, producing more heat. A lot of heat is generated by friction in various mechanical parts, which wastes energy as heat. Restricts motion, requiring more energy to overcome it. Sometimes friction also produces sound. For example, Making noise while operating a machine wastes energy and is annoying. Friction between tree branches is what ignites forest fires. Their friction is low if the surface is smooth, producing less heat.
Friction can be reduced by making the surface smooth by polishing, applying lubricants (like oil or grease) to the rubbing surface, and using wheels to move objects.

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