A Circular platform rotates around a vertical axis with angular velocity ω = 10 rad/sec. On the platform is a ball of mass 1 kg, attached to the long axis of the platform by a thin rod of length 10 cm (α = 30°). Find normal force exerted by the ball on the platform (in Newton). Friction is absent.

Engineering

Physics

Constrained Relation

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Tsinθ = mω²ℓ sinθ

T = mℓω²

Tcosθ + N = mg

N = mg – mℓω²cosθ

$N = 1 \times 10 - 1 \times 0 .1 \times \frac{1}{2} \times 100 = 5$

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