A motor attached to the shaft at O causes the arm to rotate over the range 0 le

Question

A motor attached to the shaft at O causes the arm to rotate over the range 0 le theta le 180 degree. The unstretched length of the spring is 0.67 m, and it can support both tension and compression. If the net moment about O must be zero, determine and plot the required motor torque M as a function of theta. Draw the plot and then answer the questions. Answers: If theta = 31 degree, M = N middot m If theta = 79 degree, M = N middot m If theta = 123 degree, M = N middot m The tension T in cable AB is maintained at a constant value of 110 N. Determine the moment MO of this tension about point O over the range 0 le theta le 90 degree. Plot the x-, y-, and z-components of MO as functions of theta. After you have completed the plots, answer the questions. The tension T in cable AB is maintained at a constant value of 110 N. Determine the moment MO of this tension about point O over the range 0 le theta

Explanation / Answer

moment will be zero across origin so the M=kx * perpendicular distance between 0 and spring

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