An ice skater of 560 kg spins about a vertical axis through, Ask an Expert

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An ice skater of 56.0 kg spins about a vertical axis through her body with her arms horizontally outstretched, forming 1.50 turns each second. The distance from one hand to the other is around 1.5 m. Biometric measurements indicates that each hand usually makes up around 1.25% of body weight.

i) Determine what horizontal force should her wrist exert on her hand?

ii) Derive the force in part (i) as a multiple of the weight of her hand.

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