A screw jack mechanism is shown in the figure below (not drawn to scale). A belt drives a sheave that rotates the nut. The screw is a single-thread,1 1/2-4 ACME screw. Notice that a pin is used in a groove to prevent the screw from rotating. The sheave has a pitch diameter of 14 inches. The belt is driven by an electric motor (not shown) with a sheave pitch diameter of 2.8 inches at 1650 rpm. Determine the lifting speed of the jack. Determine the belt speed. Find the lifting speed (s) of the jack (in/min): Find the belt speed vb (ft/min):

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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.