If the beam AD is loaded as shown in Figure Q4(a), determine the horizontal force P which must be applied to the wedge in order to remove it from under the beam. The coefficients of static friction at the wedge's top and bottom surfaces are µCA - 0.25 and HCB = 0.35, respectively. If P = 0, is the wedge self-locking? Neglect the weight and size of the wedge and the thickness of the beam.

In the figure, a climber with a weight of 390 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are 0 = 45° and p = 30°. If her feet are on the verge of sliding on the vertical wall, what is the coefficient of static friction between her climbing shoes and the wall? %3D %3D Hs =Number i U

In the vise shown in the figure, the screw is single-threaded in the upper member: It passes through the lower member and is held by a frictionless washer. The pitch of the screw is 3 mm, its mean radius is 12 mm. and the coefficient of static friction is 0.15.   Determine the magnitude P of the forces exerted by the jaws when M= 74-N.m couple is applied to the screw. Assuming that the screw is single-threaded at both A and B (right-handed thread at A and left-handed thread at B)   The value of magnitude P is      KN?     Note: please consider everything. Refer to the image for more clarity. On occasions, I receive wrong answers!!. Kindly please show the magnitude of P which is the final answer in " KN" in the step by step working out please. Appreciate your time!. Side note, the answer in the image is wrong. This question is very annoying!. And a lot of experts have given me wrong answers!. So I beg to show concise working out!. Also I've attached another image something to help with…

1. The light bar is used to support the m kg block in its vertical guides. If the coefficient of static friction is 0.30 at the upper end of the bar and 0.4 at the lower end of the bar, m kg a. Find the friction force acting at each end for x = 75 mm. b. Find the maximum value of x for which the bar will not slip. 218 kg m = А l = 318 mm Figure 1.