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Questions  

If a 5 kg body falls to the ground from a height of 30 m and if all its mechanical energy is converted into heat, the heat produced will be

a
350 cal
b
150 cal
c
60 cal
d
6 cal

detailed solution

Correct option is A

dQ=mgh=5×9.8×30=150×9.8 joule      =350cal

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