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Friction between hands produces heat
Friction between hands produces heat, which is the conversion of (mechanical energy) into (heat energy)
Two experiments of friction producing heat
The simplest: rubbing hands to generate heat;
Other examples: when you saw wood with an iron saw, you will find that the wood is hot and the iron saw is hotter
How is the heat generated by friction calculated?
If you rub your hands together, you will feel the heat obviously. How to calculate the heat generated by this kind of friction?
It's better to explain what each symbol represents?
The value of sliding friction multiplied by relative distance
Q=fs
S is the relative distance
How fast does friction with air produce heat
How fast will it burn?
As long as there is a relative speed with the air, it will generate heat by friction. This is the same reason as you take your knees to grind the iron rail, but you almost have no feeling when you use your knees to grind the air. The friction is very small, and the slight heat generated is instantly emitted into the air. It's just that the speed of the space shuttle is too fast, The heat generated by friction with air can make us see the feeling of flame with naked eyes. The same reason, different degree
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