A person is performing slow arm curls with 10-kgWeight as idicated in the left image of the figure below. The biceps group (consisting of the biceps and brachialis muscles) is the major factor in this exercise. Determine the magnitude F7 of the biceps group force and the magnitude 4 of the elbow joint reaction at point E for the forearm position. The free body diagram is shown in the right image of the figure. Take the dimensions shown to locate the effectivepoints of application of the biceps group; these points are 200 mm directly above E and 50 mm directly to the right of E. Include the eftect of the the 1.5-kg forearm mass with mass center at point G. Assuming that humerus is perfectly vertical and fixed; therefore, the elbow joint E is acting like pin connection. The forearm (E-B-G-C) is perfectly horizontal; therefore, the angle A-E-B is 90 deg.

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Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.