To develop muscle tone, a woman lifts a 3.30 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. Ignor (a) What is the angular acceleration, in rad/s², if the mass is 24.0 cm from the elbow joint, her forearm having a moment of inertia of 0.250 kg m², an effective perpendicular lever arm of 2.50 cm? rad/s² (b) How much work, in joules, does she do?

To develop muscle tone, a woman lifts a 3.30 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. Ignor (a) What is the angular acceleration, in rad/s², if the mass is 24.0 cm from the elbow joint, her forearm having a moment of inertia of 0.250 kg m², an effective perpendicular lever arm of 2.50 cm? rad/s² (b) How much work, in joules, does she do?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 8CQ: A massless tether with a masses tied to both ends rotates about a fixed axis through the center. Can...

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To develop muscle tone, a woman lifts a 2.50 kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. (a) What is the angular acceleration (in rad/s?) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg · m², and the net force she exerts is 750 N at an effective perpendicular lever arm of 1.90 cm? (Ignore gravity) rad/s? (b) How much work (in J) does she do?
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To develop muscle tone, a woman lifts a 2.00-kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. (a) What is the angular acceleration if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg and the net force she exerts is 750 N at an effective perpendicular lever arm of 2.00 cm? (b) How much work does she do? m²
To develop muscle tone, a woman lifts a 2.00-kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0. (a) What is the angular acceleration if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.0250 kg.m, and the net force she exerts is 750 N at an effective perpendicular lever arm of 2.00 cm? (b) Howmuch work does she do?