A circular platform rotates around a vertical axis with angular vel...

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A circular platform rotates around a vertical axis with angular velocity \( \omega=10 \mathrm{rad} / \mathrm{s} \). On the
\( \mathrm{P} \) platform a ball of mass \( 1 \mathrm{~kg} \) is placed and

W 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.
- (1) \( 15 \mathrm{~N} \)
(2) \( 5 \mathrm{~N} \)
(3) \( 10 \mathrm{~N} \)
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