STANDARDPhysics-Work, Energy and Power
STANDARD 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. The work done in pulling the entire chain on the table (Take g = 10⁻²)
A
12.9 J
B
6.3 J
C
3.6 J
D
2.0 J
Correct Answer
Option C
Detailed Explanation
The mass of the hanging part of the chain is 1.2 kg, and its weight is 12 N. The center of gravity of the hanging part lies at its midpoint, 0.30 m from the table. The work done is W = 12 × 0.30 = 3.6 J.
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