Properties Of Solids And Liquids Question 596

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

Options:

A) 350 cal

B) 150 cal

C) 60 cal

D) 6 cal

Show Answer

Answer:

Correct Answer: A

Solution:

W=JQ

⇒ mgh=J×H

⇒ Q=mghJ=5×9.8×304.2=350cal

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