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Answered

why does a sheet of sandpaper become warm when you rub it against a wooden board?

Aheat in the air is transferred to the sandpaper
Bmatter in the sandpaper is converted to heat
Cthe chemical energy in the wood is converted to thermal energy
Dthe mechanical energy of the moving sandpaper is converted to thermal energy

im inn between c or d but im stuck! please help!

Verified Answer :

it's actually Because the the friction between wood and sandpaper moves so fast it can actually warm up so hot and diesel can start. for example a rock and another rock. the friction causes sparks and heat

Friction gets built up between the two friction is everywhere