In winters, rubbing of hands together for some time, causes a sensation of warmth mainly because of:
(a) heat caused by the force of friction
(b) heat caused by the momentum
(c) heat caused by the motion
(d) heat flows from the blood to skin

In winters, rubbing hands together for some time causes a sensation of warmth mainly because of heat caused by the force of friction.

Therefore, (a) is correct. 

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Updated on: 10-Oct-2022

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