Per NCERT Ex 1.5, the period of a simple pendulum T derived from dimensional analysis (l, g, m) gives which form?
AT = k√(l/g)
BT = k√(m/g)
CT = k(m·l)
DT = k(lg)
Answer & Solution
Correct answer: A. T = k√(l/g)
NCERT Ex 1.5: solving x + y = 0, -2y = 1, z = 0 gives x = 1/2, y = -1/2, z = 0. So T ∝ √(l/g); mass drops out.
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