Q. A 52 kg ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.0 turns each second. The distance from one hand to the other is 1.50m. Biometric measurements indicate that each hand typically makes up about 1.25% of body weight. What horizontal force must her wrist exert on her hand?
Q. A person (weight W=598 N, L1=0.835 m, L2= 0.405 m) is doing push-ups. Find the normal force exerted by the floor on each hand and each foot, assuming that the person holds this position.