The elements of a floor jack are shown in the figure. If the hydraulic cylinder AB is designed to support a maximum compressive force of 37 kN, determine at this condition the load L (in kN) and the force (in kN) in link EF. Also, calculate the corresponding pin reaction (in kN) at C. Draw the correct FBD's of the hydraulic cylinder AB, link EF and platform DF. Also, draw the combined FBD of the platform DF and member BCD. Note that figure CDFE if traced is a parallelogram. Also, members BCD and EF are connected to the base of the jack by pins at C and E, respectively. Disregard friction between the contacting faces of members BCD and EF.
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
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