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Per NCERT Example 6.3 (L-shaped uniform lamina), if all three identical squares have equal mass, the CM coincides with which feature?
AThe centroid of the squares' geometric centres
BOutside the L-shape entirely
CThe geometric centre of the largest square
DOne of the corners of the L
Answer & Solution
Correct answer: A. The centroid of the squares' geometric centres
NCERT Ex 6.3: with equal masses at C₁(1/2,1/2), C₂(3/2,1/2), C₃(1/2,3/2), the CM is the centroid: ((1/2+3/2+1/2)/3, (1/2+1/2+3/2)/3) = (5/6, 5/6).
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