Per NCERT Ex 1.5, dimensional analysis CANNOT determine which feature of the simple pendulum formula T = 2π√(l/g)?
AThe dependence on length l
BThe dependence on mass m
CThe dependence on gravity g
DThe dimensionless constant 2π
Answer & Solution
Correct answer: D. The dimensionless constant 2π
NCERT Ex 1.5 + §1.6.2: dimensional analysis gives functional form but not pure numerical factors (2π must come from solving the ODE).
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