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# To develop muscle tone, a woman lifts a 2.00-kg weight

ISBN: 9780130606204 3

## Solution for problem 30PE Chapter 10

Physics: Principles with Applications | 6th Edition

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Problem 30PE

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 60.0º . (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 ? m2 , 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?

Step-by-Step Solution:

Step-by-step solution Step 1 o f 10 (a) The net torque acting on the elbow joint is given as, Here, is the torque due to the force exerted by the biceps and is the torque on the elbow joint due to weight in the forearm. Step 2 o f 10 Calculate the torque due to the force exerted by the biceps from relation, Here, is the force exerted and is the perpendicular distance. Step 3 o f 10 Substitute for and for in equation, Solve, Step 4 o f 10 Calculate the torque on the elbow joint due to weight in the forearm from relation, Here, m is the mass of the object, g is the gravitational acceleration and R the distance. Step 5 o f 10 Substitute for , for , and for in equation, Solve

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##### ISBN: 9780130606204

This full solution covers the following key subjects: arm, weight, muscle, inertia, biceps. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. The answer to “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 60.0º . (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 ? m2 , 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?” is broken down into a number of easy to follow steps, and 84 words. Since the solution to 30PE from 10 chapter was answered, more than 780 students have viewed the full step-by-step answer. Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204. The full step-by-step solution to problem: 30PE from chapter: 10 was answered by , our top Physics solution expert on 03/03/17, 03:53PM.

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