Properties Of Solids And Liquids Question 47
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 [CPMT 1975]
Options:
A) 350 cal
B) 150 cal
C) 60 cal
D) 6 cal
Show Answer
Answer:
Correct Answer: A
Solution:
$ W=JQ $
therefore $ mgh=J\times H $
therefore $ Q=\frac{mgh}{J}=\frac{5\times 9.8\times 30}{4.2}=350cal $
