(a) Draw the FBD of A and B when the wedge B impends to slide to the left. Friction is negligible except for the surface under B whose coefficient of friction is 0.20. (b) Determine the magnitude of P to start the wedge B to slide to the left. 30 120 fb B 80 lb
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Show all the applied forces in FBD. Please answer fast because I only have 30 minutes left.
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- The 600-lb cable spool is placed on a frictionless spindle that has been driven into the ground. If the force required to start the spool rotating is F = 160 lb, determine the coefficient of friction between the ground and the spool. Neglect the diameter of the spindle compared to the diameter of the spool.The leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.Two blocks are being pushed along an incline. Block A weighs 7.00 kg and block B weighs 14.00 kg. The coefficient of non-sliding friction between block B and the surface of the incline is 0.200 and the coefficient of sliding friction is 0.1000. Assume that the coefficient of friction between the two blocks are too high to cause sliding between the two blocks. The applied force is 185 N. 185 N 40° 5. Which of the following gives the closest value to the magnitude of the acceleration of both blocks? 1.752 m/s2 1.000 m/s2 6.16 m/s2 3.21 m/s2
- Two blocks are joined by an inextensible cable as shown. The mass of block A is 189.5 kg and the mass of block B is 261.3 kg. If the system is released from rest, determine the tension (in N) in the cable. Assume that the coefficient of friction between block A and the plane is uk = 0.33 and that the pulley is weightless and frictionless. Round off only on the final answer expressed in 3 decimal places. Use g = 9.81 m/s? blocks.png ... A ВTwo blocks are being pushed along an incline. Block A weighs 7.00 kg and block B weighs 14.00 kg. The coefficient of non-sliding friction between block B and the surface of the incline is 0.200 and the coefficient of sliding friction is 0.1000. Assume that the coefficient of friction between the two blocks are too high to cause sliding between the two blocks. The applied force is 185 N. A 185 N 40° 4.Which of the following gives the closest value to the magnitude of the frictional force between block B and the incline? 52.6 N 15.78 N 31.6 N 10.52 NA 100-lb block is pushed at constant speed for a distance of 20 ft along a level floor by a force that makes an angle of 35° with the horizontal, as shown in Fig. The coefficient of friction between the block and the floor is 0.35. Determine The work done on the block by the force. F. 35°
- Two blocks are joined by an inextensible cable as shown. The mass of block A is 140.9 kg and the mass of block B is 271.1 kg. If the system is released from rest, determine the tension (in N) in the cable. Assume that the coefficient of friction between block A and the plane is uk = 0.39 and that the pulley is weightless and frictionless. Round off only on the final answer expressed in 3 decimal places. Use g = 9.81 m/s² A BA 12 ft ladder weighing 40 lb is placed. When a 180 lb man reaches a point 8ft from the lower end, the ladder is about to slip. Determine the coefficient of friction between the ladder and the floor. The coefficient of friction between the ladder and the wall is 0.20. The angle between the floor and the ladder is 60 degrees.2. The 100 – Ib force acts as shown on a 300 - Ib block placed on an inclined plane. The coefficients of friction between the block and the plane are us = 0.25 and Hk = 0.20. Determine whether the block is in equilibrium, and find the value of the friction for the friction force. 300 Ib 100 lb
- A 400-N cabinet is being pushed by a man on a concrete floor with a coefficient ofstatic friction of 0.37 and a coefficient of kinetic friction of 0.12. He exerts a force, F, of100 N at an angle of θ = 20° on the cabinet.Determine:i. The normal force, N (draw the FBD)ii. The characteristic of friction or the state of motion (static or kinetic)iii. The value of the actual friction force, Ff (show the equations of equilibrium)iv. The value of F if the motion is impending (show the equations of equilibrium)1. The two 890 N blocks are pushed apart by the 150 wedge of negligible weight. The angle of static friction is 12° at all surfaces. Determine the force P required to start the blocks moving. 890N 890NDetermine the magnitude and direction of the friction force exerted on the 100-lb block when (a) 0= 15°, (b) 0= 30°. For both parts, let P 120 lb. Draw separate FBDS for each part of the problem. %3D