A circular platform rotates around a vertical axis \( \mathrm{P} \)...

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A circular platform rotates around a vertical axis
\( \mathrm{P} \)
with angular velocity \( \omega=10 \mathrm{rad} / \mathrm{s} \). On the platform
W
is a ball of mass \( 1 \mathrm{~kg} \), attached to the long axis of the platform by a thin rod of length \( 10 \mathrm{~cm}\left(\alpha=30^{\circ}\right) \). Find normal force exerted by the ball on the platform (in newton). Friction is absent.
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