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 $
$ \Rightarrow $ $ mgh=J\times H $
$ \Rightarrow $ $ Q=\frac{mgh}{J}=\frac{5\times 9.8\times 30}{4.2}=350cal $
