6-49 Determine the force P required to push the 300-lb cylinder over the small block shown in Fig. P 3 in. 9 in. 20
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- The homogeneous plate of weight W is supported by a ball-and-socket joint at D and three wires. Draw the FBD of the plate and count the unknowns.Repeat Prob. 4.152 assuming that the 400-kN force is applied at O instead of L.The homogeneous plate of weight W is suspended from two cables. Determine the force P that is necessary to keep the plate in the position shown.
- The center of gravity of the nonhomogeneous bar AB is located at G. Find the angle at which the bar will be in equilibrium if it is free to slide on the frictionless cylindrical surface.The linkage is made of two homogenous bars of weights shown in the figure. Determine the horizontal force P required to hold the linkage in the position shown.The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016, determine the force F required to advance the bar at a constant speed.
- Draw the FBD for the bar described in Prob. 5.1 if the bar is homogeneous of mass 50 kg. Count the unknowns.Determine the smallest horizontal force P that would push the homogeneous cylinder of weight W over the curb. Neglect friction.The uniform ladder of weight W is raised slowly by applying a vertical force P to the rope at A. Show that P is independent of the angle .
- The coeffient of static friction between the uniform bar AB of weight W and the ground is 0.45. Find the smallest angle and the corresponding force P that would initiate simultaneous tipping and sliding of the bar.Find the smallest value of P for which the crate in the Prob. 4.34 will be in equilibrium in the position shown. (Hint: A rope can only support a tensile force.)The homogeneous 240-lb bar is supported by a rough horizontal surface at A, a smooth vertical surface at B, and the cable BC. Draw the FBD of the bar and count the unknowns.