NEETPhysics-Work, Energy and Power
NEET Physics Work done by a force MCQ Question
Type: MCQ-numerical-Medium-Class 11
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
A
1200 J
B
7.2 J
C
3.6 J
D
120 J
Correct Answer
Option C
Detailed Explanation
The work done is equal to the change in potential energy. W = mgh = (4 kg)(9.8 m/s²)(0.6 m) = 3.6 J.
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