NEET2020Physics-Mechanics
NEET 2020 Physics Center of Mass MCQ Question
Type: MCQ-numerical-Easy-Class 11
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The centre of mass of the system from the 5 kg particle is nearly at a distance of:
A
67 cm
B
80 cm
C
33 cm
D
50 cm
Correct Answer
Option A
Detailed Explanation
Taking the 5 kg particle at origin, the center of mass = (m₁×0 + m₂×1)/(m₁+m₂) = (10×1)/(5+10) = 10/15 = 2/3 m ≈ 67 cm from the 5 kg particle. The original explanation incorrectly calculated 33 cm (distance from the 10 kg particle). The correct answer is A.
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