During a giant swing on the horizontal bar, a gymnast changes their body positio

Question

During a giant swing on the horizontal bar, a gymnast changes their body position to help them complete their rotational motion. Assume that the mass of the gymnast is 42 kg and that her center of mass is located at her hips (the dot shown etermine the. % difference between the gravitational torque exerted when she is at point 5 in the rotation and at point 9 in the rotation. 7. If we model the gymnast as a long rod pivoted at its endpoint, what is her angular acceleration at point S in the rotation? point of the tooth and the line of action of the force is 10.0 mm as shown in the diagram? The moment-torque applied to the tooth is t 0.0087 N-m. 8. What normal force would need to be applied to an incisor by the braces-bracket if the perpendicular distance from the pivot

Explanation / Answer

Problem 8)

As torque, = r F sin

0.0087 Nm = 0.010 x F x sin90°

Therefore, force, F = 0.0087/0.010 = 0.87 N

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