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PhysicsQ&A LibraryTo develop muscle tone, a woman lifts a 3.70 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. Ignore gravity. (a) What is the angular acceleration if the mass is 24.0 cm from the elbow joint, her forearm having a moment of inertia of 0.250 kg · m2, and the muscle force being 760 N at an effective perpendicular lever arm of 2.50 cm? (b) How much work does she do?Start your trial now! First week only $4.99!*arrow_forward*

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To develop muscle tone, a woman lifts a 3.70 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. Ignore gravity. (a) What is the angular acceleration if the mass is 24.0 cm from the elbow joint, her forearm having a moment of inertia of 0.250 kg · m^{2}, and the muscle force being 760 N at an effective perpendicular lever arm of 2.50 cm? (b) How much work does she do?

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