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- Q2 The 80-lb block C rests on the uniform 15-lb bar AB. The cable connecting C to B passes over a pulley at D. Find the magnitude of the force acting between the block and the bar. C. 30P2: The 50-lb rectangular access door is held in the 90° open position by the single prop CD. Determine the force F in the prop and the magnitude of the force normal to the hinge axis AB in each of the small hinges A and B. 12" 40" D 27 B 24" 48In the equilibrium position shown, the resultant of the three forces acting on the bell crank passes through the bearing O. Determine the vertical force P. Does the result depend on 0? 77 lb 8" 24° $ 46 lb Answer: P = i O 10" lb
- 2. The homogeneous bar AB weighs 25 lb. Determine the forces acting on the bar at A and B. Neglect friction. 60° AIn the equilibrium position shown, the resultant of the three forces acting on the bell crank passes through the bearing O. Determine the vertical force P. Does the result depend on 6? 55 lb 78 lb Answer: P = $ 25+1) Determine the horizontal tangential force P needed to cause the motion. Express your answer in pounds to three significant figures. 2) Determine the horizontal normal force component that the spool exerts on the rod. Express your answer in pounds to three significant figures.
- A puck weighs 9 lb and rests on the center of the frictionless surface of the ramp supported in equilibrium by ropes AC and BC. Determine the normal force the ramp exerts on the puck as well as the tension in each of the two ropes. X g a b A Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value 44.0 in 48.4 in 24.2 in 50.8 in 50.6 in 12.1 in 71.3 in C d Z e f 9 BP2: The 50-lb rectangular access door is held in the 90° open position by the single prop CD. Determine the force F in the prop and the magnitude of the force normal to the hinge axis AB in each of the small hinges A and B. 12" 40" C 2 B 48The cable that suspends the 132 kg mass wraps over the pulley with center C and ties off at E. The pulley has negligible radius. (Assume that the +x-axis is to the right and the +y-axis is up along the page. |132 kg 3.2 m 2.4 m 2.4 m Determine the force that pin A exerts on bar ABC, and determine member force BD. (Enter forces in kilonewtons.) A magnitude kN direction magnitude kN direction magnitude kN sense compression Determine the force that pin C exerts on bar ABC. (Enter the magnitude in kilonewtons and the direction in degrees counterclockwise from the +x-axis.) magnitude kN direction ° counterclockwise from the +x-axis
- Q2 Draw the F.B.D for the bar AB and find the reaction forces in A and B If the weight of the bar is 40 kg? the length of AB is 2 m at 30° with the ground? 409 1988For the pair of 25-lb forces applied to the handles of the crimper tool, determine the crimping force in the jaws at G. 1.75" 25° 2.75"> 5.25" 25 lb A 0.60" 0.25" 0.45" E B 0.85" 5.75" 25 lb Answer: FG = i lb2. The L-shaped bracket is bolted securely to the shaft at O, so that the bracket cannot move in any way. The forces F1 and F2, as well as the dimension d, are given, and the bracket's weight is negli- gible. What loads act on the bracket at 3d O? 4d F2 30 F1 4d