Work Energy And Power Question 270
Question: A 10 m long iron chain of linear mass density $ 0.8 kg {m^{-1}} $ is hanging freely from a rigid support. If $ g~=10 m{s^{-2}} $ , then the power required to left the chain up to the point of support in 10 second
Options:
A) 10 W
B) 20 W
C) 30 W
D) 40 W
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ m=10\times 0.8kg = 8kg $
Height of iron chain $ =5m $
$ P=\frac{mgh}{t}=\frac{8\times 10\times 5}{10}W=40w $
