AIPMT PRELIMS2006Physics-Mechanics
AIPMT PRELIMS 2006 Physics Work and Energy MCQ Question
Type: MCQ-numerical-Medium-Class 11
A body of mass 3 kg is under a constant force which causes a displacement s in metres in it, given by the relation s = (1/3) t², where t is in s. Work done by the force in 2 s is:
A
(17/3)J
B
(3/8)J
C
(8/3)J
D
(3/17)J
Correct Answer
Option C
Detailed Explanation
The displacement s = (1/3)t² implies acceleration a = 2/3 m/s². Force F = ma = 2 N. Work done W = F × s = 2 × (1/3) × 4 = 8/3 J.
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