A bodybuilder holds a dumbbell of weight Wd. His arm is horizontal and weighs 47 N. The deltoid muscle is assumed to be the only muscle acting and is attached to the arm as shown. The maximum force M that the deltoid muscle can supply has a magnitude of 2481 N. The distances that locate where the various forces act on the arm. What is the weight of the heaviest dumbbell that can be held by the bodybuilder? Note: Express your answer in whole numbers. No unit is required for the final answer. M D.. r13.0 +y 0.150 m 0.280 m +T 0.620 m (b) Free-body diagram of the arm M Deltoid Dumbbell -13.0 muscle Axis Wa Shoulder joint (a) (c)

A bodybuilder holds a dumbbell of weight Wd. His arm is horizontal and weighs 47 N. The deltoid muscle is assumed to be the only muscle acting and is attached to the arm as shown. The maximum force M that the deltoid muscle can supply has a magnitude of 2481 N. The distances that locate where the various forces act on the arm. What is the weight of the heaviest dumbbell that can be held by the bodybuilder? Note: Express your answer in whole numbers. No unit is required for the final answer. M D.. r13.0 +y 0.150 m 0.280 m +T 0.620 m (b) Free-body diagram of the arm M Deltoid Dumbbell -13.0 muscle Axis Wa Shoulder joint (a) (c)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

A bodybuilder holds a dumbbell of weight Wd. His arm is horizontal and weighs 47 N. The deltoid muscle is
assumed to be the only muscle acting and is attached to the arm as shown. The maximum force M that the
deltoid muscle can supply has a magnitude of 2481 N. The distances that locate where the various forces act
on the arm. What is the weight of the heaviest dumbbell that can be held by the bodybuilder? Note: Express
your answer in whole numbers. No unit is required for the final answer.
M.
...
r13.0°
+y
Wa
0.150 m
0.280 m
+T
0.620 m
(b) Free-body diagram of the arm
M
Deltoid
Dumbbell
13.0
muscle
Axis
Shoulder
joint
(a)
(c)

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