Arm ABC is connected by pins to a collar at Band to crank CD at C. Neglect the effect of friction. 160 mm 90 mm 180 mm B 320 mm 125 mm 300 mm Draw the free-body diagram of the member ABC and CD.
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- 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.The weight of the wheel is 100 Newtons (with mass uniformly distributed). The static coefficient of friction between the wheel and the surface is ls = 0.35. A couple-moment, M, is applied to the wheel in the direction shown. Part One: Draw the FBD of the wheel. (Alternatively, you may draw the FBD of the wheel/link- AB as a single, combined object.) You may NOT use the given existing figure. (Hint: Taken in isolation, the link-AB is a two-force member.) Part Two: Write the equations of equilibrium, and at the point of impending motion (slipping), calculate: a) The minimum applied couple Mmin that is required to initiate slipping (in Newton-meters) b) The maximum friction force, Fmax (in Newtons). c) The normal force, N (in Newtons) of the surface on the wheel (in Newtons). d) The force of the link-AB on the wheel, FAB (in Newtons). B 150 mm M 250 mm A5. Blocks A and B weigh 250N and150N, respectively. Using the coefficients of static friction indicated as in Figure S6, i. Draw the free body diagram for the pulley C, pulley D, block A and block B State the equation of the tensions T, and Tc in the terms of W for both of the pulley system. i. (Assume that slip impends between the pulley and the block E. W is the weight of the block E) iii. Determine the greatest weight W of the block E without causing motion 0.45 m He =0.2 A 0.6m 4,= 0.3 HD =0.3 H = 0.5 5 12
- Problem -03Dry FrictionA band belt is used to control the speed of a flywheel as shown in figure-3.Determine the magnitude of the couple being applied to the flywheel, knowing that the coefficient of kinetic friction between the belt and the flywheel is 0.25 and that the flywheel is rotating clockwise at a constant speed. Show that the same result is obtained if the flywheel rotates counterclockwise.The doorstop depicted in Fig. 16-2a has the following dimensions: a =6 in. b =4 in, c = 1.6 in, w1 = 1 in, w2 = 0.75 in, where w2 is the depth of the pad into the plane of the paper. (a) For a leftward relative movement of the floor, an actuating force F of 10 lbf, a coef- ficient of friction of 0.4, use a uniform pressure distribution pav, find Ry, Ry, pav, and the largest pressure Pa. (b) Repeat part a for rightward relative movement of the floor.The figure shows a mechanism that raises packages in a transfer mechanism. A 500-N package sits on the horizontal output link O4BD while the crank O2A is rotating at constant speed of 400 rpm CW. At the position shown the crank OA is vertical and the output link O4B is horizontal. we need to determine the torque required from the motor at the crank 02A and the force in member AB The weights of the links are negligible. 30mm 450mm 500N 220 mm B 374 mm 374 mm The angular velocity of the link O,BD in rad/s is = The magnitude of the velocity of point D in m/s is =
- The figure shows a mechanism that raises packages in a transfer mechanism. A 200-N package sits on the horizontal output link O4BD while the crank O2A is rotating at constant speed of 287 rpm CCW. At the position shown the crank OA is vertical and the output link OB is horizontal. we need to determine the torque required from the motor at the crank O2A and the force in member AB The weights of the links are negligible. 50mm 450mm 200 N 200 mm B. 374 mm 300mm X The angular velocity of the link OĄBD in rad/s is = Choose... + The magnitude of the velocity of point D in m/s is = Choose... + The torque required from the motor at the crank O2A in N.m is = Choose... : The force in member AB in N is = Choose... +Solve each of the following problems indicated below. Present your complete-detail solution including the free- body diagrams. (1) The maximum tension that can be developed in the cord show in Figure below is 500 N. If the pulley at A is free to rotate and the coefficient of static friction at the fixed drums B and C is u, = 0.25, determine the largest mass of the cylinder that can be lifted by the cord. Assume that the force T applied at the end of the cord is directed vertically downward, as shown. D B 45° CThe force in member CE (kips) is equal to: a. 5.2 k (Tension) b. 11.5 k (Tension) c. 5.2 k (Compression) d. 11.5 k (Compression) 12 ft IC 5 ft 5ft 5ft 30 k 25 k Full Solution of Problem 1
- The band brake of Fig. is used to control the rotation of a drum. The coefficient of friction between the belt and the 40 V-pulley is 0.10. The weight of the handle is 2 lb. If a force of 50 lb is applied to the end of the han- dle, determine the maximum torque for which no motion occurs if the torque is applied Clockwise. 50 Ib 3 in. +9 in- 18 in.-The band brake of Fig. is used to control the rotation of a drum. The coefficient of friction between the belt and the 40 V-pulley is 0.10. The weight of the handle is 2 lb. If a force of 50 lb is applied to the end of the han- dle, determine the maximum torque for which no motion occurs if the torque is applied Counterclockwise. 50 Ib 3 in. +9 in- 18 in.-For Probs. 1-3, (a) draw the free-body diagrams for the entire assembly (or structure) and each of its parts. Neglect friction and the weights of the members unless specified otherwise. Be sure to indicate all relevant dimensions. For each problem, (b) determine the total number of unknown forces and the total number of independent equilibrium equations. Problem 1 500 N 500 N 1 m 500 N (b) (c) Figure 1 Problem 2 -- Ift 4 ft -1.8 ft 100 lb F1.8 ft - 100 lb 100 lb (а) (b) (c)