Engineering Statics | P3/33 | 2D Equilibrium | Chapter 3 | 6th ed | Engineers Academy

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Engineering Statics by Meriam and Kraige
Engineering Statics | P3/33 | 2D Equilibrium | Chapter 3 | 6th ed | Engineers Academy

Chapter 3: Equilibrium
3/33 A person is performing slow arm curls with a 10-kg weight as indicated in the figure. The brachialis muscle group (consisting of the biceps and brachialis muscles) is the major factor in this exercise. Determine the magnitude F of the brachialis-muscle group force and the magnitude E of the elbow joint reaction at point E for the forearm position shown in the figure. Take the dimensions shown to locate the effective points of application of the two muscle groups; these points are 200 mm directly above E and 50 mm directly to the right of E. Include the effect of the 1.5-kg forearm mass with mass center at point G. State any assumptions.

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[samizzoventures]

A good explanation. simple and direct to the point.

[Hammy]

how do we know whihc direction to put Ey and Ex??