3. A block with a mass of 160-kg is supported EDI by a cable which passes over a 150-mm diameter pulley that is attached to a frame as shown in the figure. Determine all forces acting on member BCD of the frame.

The structure shown below is a simplified tower crane. It carries a shipping crate suspended from B that has a weight of 116 kN . The main jib DCB (in green) has a weight of 17 kN concentrated in the center of the beam. This is pinned to the main body at D and is supported by a cable that is routed through pulleys at F and G and is attached to a concrete counterweight J. The main body AEFG (in yellow) is fixed to the ground at A.   Various geometry: h1= 26.5 m h2= 3.9 m h3= 5.1 m l1= 12.8 m l2= 17 m l3= 4.3 mm θ= 57.6 degrees   Assumptions :  The main body AEFG can be considered massless. The cable CFGJ is massless. The pulleys at F and G can be considered massless, frictionless, and of negligible diameter. All bodies are considered rigid.   Questions:  Determine the weight of counterweight J in order for the main jib DCB to be horizontal. Determine the magnitude of the x and y components of force at pin D. Determine the reactions at fixed support A.

Question 1 Member ABC of negligible weight is supported by a pin and bracket at B and by an inextensible cord attached at A and C and passing over a frictionless pulley at D. For the loading shown and neglecting the size of the pulley, calculate the tension in the cord ,the horizontal and vertical reactions at point B. (X,XX,XXX represents the last digits number of your IC). 1 257mm 75 N 167mm B 127 mm

A rear suspension system for a front wheel-drive vehicle is shown here. Spring EF is offset behind member CD. The normal force due to contact between 2 wheel and the road is 4200 N. Assume the weight of the wheel and suspension system components is negligible. (a) Determine the magnitude of the force in member CD. Is the member in tension or compression? (b) Determine the support reactions at A. (c) Determine the unstretched length of the spring EF given a spring constant of 150 kN/m. 60 mm 1130 mm 60 mm 245 mm D 220 mm F 260 mm E B 165 mm 90 mm F = 4200 N

One of the smooth vertical walls supporting end B of the 230-kg uniform shaft is turned through a 21° angle as shown here. End A is supported by the ball-and-socket connection in the horizontal x-y plane. Calculate the magnitudes of the forces P and R exerted on the ball end B of the shaft by the vertical walls C and D, respectively. Assume a = 5.6 m, b = 2.3 m, L = 6.5 m, and 0 = 21° Answers: P = 2245 R = H. B a L D N A !N b