Question

A body of mass 5 kg falls from a height of
30 metre. If its all mechanical energy is changed
into heat, then heat produced will be:-
(1) 350 cal
(2) 150 cal
(3) 60 cal
(4) 6 cal
Explain in detail about the unit conversion​

Answer 1

Answer:

wkt potential energy=mgh

here the whole potential energy of the object changes into heat energy

so mgh=1500J

wkt 1cal=4.2J

so 1500J=357 cal.

so the answer is a (nearest option)

hope it helps

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