A woman is holding a 2.8-kg sphere in her hand with the entire arm held horizontally as shown in the figure. A tensile force in the deltoid muscle prevents the arm from rotating about the shoulder joint O; this force acts at the 23° angle shown. Determine the force Fp 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 (positive to the right and up). The mass of the upper arm is my= 2.0 kg, the mass of the lower arm is m= 1.0 kg, and the mass of the hand is mH= 0.4 kg; all the corresponding weights act at the locations shown in the figure. Answers: FD- i Ox= Oy i i Deltoid muscle FD 23° 120 mm 125 mm396 mm- WU 600 mm- WL N Z Z Z N N 2.8(9.81) N YWH

A woman is holding a 2.8-kg sphere in her hand with the entire arm held horizontally as shown in the figure. A tensile force in the deltoid muscle prevents the arm from rotating about the shoulder joint O; this force acts at the 23° angle shown. Determine the force Fp 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 (positive to the right and up). The mass of the upper arm is my= 2.0 kg, the mass of the lower arm is m= 1.0 kg, and the mass of the hand is mH= 0.4 kg; all the corresponding weights act at the locations shown in the figure. Answers: FD- i Ox= Oy i i Deltoid muscle FD 23° 120 mm 125 mm396 mm- WU 600 mm- WL N Z Z Z N N 2.8(9.81) N YWH

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.

Question

4. Not a graded question.

A woman is holding a 2.8-kg sphere in her hand with the entire arm held horizontally as shown in the figure. A tensile force in the
deltoid muscle prevents the arm from rotating about the shoulder joint O; this force acts at the 23° angle shown. Determine the force
Fp 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
(positive to the right and up). The mass of the upper arm is my= 2.0 kg, the mass of the lower arm is m₁= 1.0 kg, and the mass of the
hand is mH= 0.4 kg; all the corresponding weights act at the locations shown in the figure.
Answers:
FD= i
Ox=
Oy=
i
i
Deltoid muscle
FD
A
23°
WU
120 mm
125 mm
396 mm-
y
600 mm-
WL
N
N
Z Z
N
2.8(9.81) N
WH

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