Review Problems

REVIEW PROBLEMS, 1 June 2009, MAE 241 Summer, K.Sierros 1) The device is used for surgical replacement of the knee joint. If the force acting along the leg is 360 N, determine its components along the x’ and y axes.

2) The resultant FR of the two forces acting on the log is to be directed along the positive x axis and have a magnitude of 10 kN, determine the angle θ of the cable, attached to B such that the magnitude of force FB in this cable is a minimum. What is the magnitude of the force in each cable for this situation?

3) The gusset plate is subjected to the forces of three members. Determine the tension force in member C and its angle θ for equilibrium. The forces are concurrent at point O. Take F = 8 kN.

4) The spring has a stiffness of k = 800 N/m and an unstretched length of 200 mm. Determine the force in cables BC and BD when the spring is held in the position shown.

5) The wheelbarrow and its contents have a mass of 50 kg and a center of mass at G. If the resultant moment produced by force F and the weight about point A is to be zero, determine the required magnitude of force F.