A man is holding a 3.6-kg sphere in his hand with the entire arm held horizontally as shown in the figure. tensile force in the deltoid muscle prevents the arm from rotating about the shoulder joint O; this force acts at the angle shown. Determine the force exerted by the deltoid muscle on the upper arm at A and the x- and y-components of the force reaction at the shoulder joint O. The mass of the upper arm is (m,=1.9 kg), the mass of the lower arm is (m=1.1 kg), and the mass of the hand is (m;=0.4 kg); all the corresponding weights act at the locations shown in the figure. x= 6 mm y 3.6(9.81) N Deltoid muscle Fp 21° 'Wy (WH 125 mm 130 mm 412 mm (635+x) mm

A man is holding a 3.6-kg sphere in his hand with the entire arm held horizontally as shown in the figure. tensile force in the deltoid muscle prevents the arm from rotating about the shoulder joint O; this force acts at the angle shown. Determine the force exerted by the deltoid muscle on the upper arm at A and the x- and y-components of the force reaction at the shoulder joint O. The mass of the upper arm is (m,=1.9 kg), the mass of the lower arm is (m=1.1 kg), and the mass of the hand is (m;=0.4 kg); all the corresponding weights act at the locations shown in the figure. x= 6 mm y 3.6(9.81) N Deltoid muscle Fp 21° 'Wy (WH 125 mm 130 mm 412 mm (635+x) mm

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter4: Coplanar Equilibrium Analysis

Section: Chapter Questions

Problem 4.41P: The center of gravity of the 3000-lb car is at G. The car is parked on an incline with the parking...

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