How is friction and temperature related?

Subject - Science

With friction time increased, temperature rises during the dry sliding process and results in performance degradation and unstable friction properties, which is different with the result of environment temperature.

Explanation:

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Friction is an everyday force that is created by two surfaces interacting. When these surfaces slide against eachother, this interaction increases the thermal energy of the two surfaces (the temperature goes up). The coefficient of friction is found to be strongly dependent on temperature and decreases continuously from 0.78 to 0.46 between 24° C and 450° C

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask