Which one of the following shows that friction can produce heat?

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Washing clothes

Rubbing of palms

Both 1 & 2

None of the above

answer is B.

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Detailed Solution

Rubbing of palms shows that friction can produce heat.
In the winter, people rub their hands together to warm themselves up and combat the cold. This occurs due to the friction created while rubbing our hands together. As our palm surfaces are rough, when we rub them, it creates friction, generating heat and making our palms warm.

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