A child of mass 5 kg is going round a merry-go-round that makes 1 rotation in 3.14 s. The radius of the merrygo-round is 2 m. The centrifugal force on the child will be
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Question

A child of mass 5 kg is going round a merry-go-round that makes 1 rotation in 3.14 s. The radius of the merrygo-round is 2 m. The centrifugal force on the child will be

G1 Physics · Accepted Answer

Angular speed of the merry-go-round is ω = 2π/T Given T = 3.14 s: ω ≈ 2π/3.14 ≈ 2 rad s⁻¹ Centrifugal-force magnitude in the rotating frame is F = mω²r = 5 × (2)² × 2 = 40 N Hence option A follows.