Determine the minimum applied force P required wedge A to the right.
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- The square-threaded screw 0f the C-clamp has a mean diameter of 8 mm and a pitch of 1.6 mm. The coefficient of static friction between the threads is 0.2. If the torque C=1.50Nm is used to tighten the clamp, determine (a) the clamping force; and (b) the torque required to loosen the clamp.The screw of the carjack has a pitch of 0.1 in. and a mean radius of 0.175 in. Note that the ends of the screw are threaded in opposite directions (right- and left-handed threads). The coefficient of static friction between the threads is 0.08. Calculate the torque C0 that must be applied to the screw in order to start the 1200-1b load moving (a) upward; and (b) downward.Based on Problem 8-13 from the textbook. The brake is to be designed to be self locking, that is, it will not rotate when no load P is applied to it when the disk is subjected to a clockwise couple moment Mo. Determine the distance d of the lever that will allow this to happen. The coefficient of static friction at B is H₂- Us=0.48 a=0.6ft P a Mo 1 ft
- The small roller on the upper end of the uniform rod rests against the vertical surface at A while the rounded end B rests on the platform which is slowly pivoted downward beginning at the horizontal position shown. For a coefficient of static friction , 0.37 at B, determine the angle of the platform at which slipping will occur. Neglect the size and friction of the roller and the small thickness of the platform. Assume = 28° Answer: 8- L H₁ BThe coefficient of static friction for all contacting surfaces is μ = 0.35 in (Figure 1). Figure k = 15 kN/m- LOOO O O O 10° 1 of 1 > Part A If P = 290 N, determine the required minimum compression in the spring so that the wedge will not move to the right. Neglect the weight of A and B. Neglect friction at the rollers. Express your answer to three significant figures and include the appropriate units. x = Submit ■ μA Value Request Answer Units < Return to Assignment Provide Feedback ?3. The pulley has a radius of 3". And fits loosely on the 0.5" diameter shaft. If the loadings acting on the belt cause the pulley to rotate with constant angular velocity, determine the frictional force between the shaft and the pulley and compute the coefficient of kinetic friction. The pulley weighs 18lbs 3 in. 5 lb 5.5 lb
- Determine the coefficient of static friction if motion is imminent, and the direction of this movement. If P= 55 N and M= 300 Nm The wheel is connected with a pin in B.The square-threaded screw of the C-clamp has a mean diameter of 9 mm and a pitch of 1.5 mm. The coefficient of static friction between the threads is 0.2. If the torque M = 1.25 N · m is used to tighten the clamp, calculate (a) the clamping force; and (b) the torque required to loosen the clamp.The 2-Mg lathe with mass center at G is positioned with the aid of the 5° steel wedge. Determine the horizontal force P required to remove the wedge if the coefficient of friction for all contacting surfaces is 0.30. GO A В P\ 5° 900 mm 2300 mm
- The clamp exerts a 145 lb compressive force on the wood blocks. Single-threaded screw BC has lead L = 0.190 in. and mean diameter d = 0.370 in. It turns in the threaded sleeve at C and pushes against B. The coefficient of static friction between the screw threads and the threaded sleeve is = 0.300. Neglect friction at B. 2 in. 2 in. 2 in. B 2.25 in. 2.40 in. 2.25 in. (a) Determine the value of the moment M in ft · Ib to increase the clamping force. (Enter the magnitude.) ft · Ib (b) Determine the value of the moment M in ft · Ib to decrease the clamping force. (Enter the magnitude.) ft · IbThe figure shows a part of a machine used to crush recycled cans. Link ABC is attached to the ground at pin A and link BD is attached to the piston D using also a pin connection. When α=45°, θ=55°, and β=15°, the machine is about to start moving, i.e. impending motion. If the coefficient of static friction and kinetic friction between the piston D and the wall are μs=0.25 and μk=0.2 respectively, find the magnitude of force applied to the cans by the piston for P=200 kN.8-17. If the coefficient of static friction between the rear wheels of the tractor and the ground is flg = 0.6, determine if the rear wheels slip or the front wheels lift off the ground as the engine provides a torque M to the rear wheels. What is the torque needed to cause the motion? The front wheels are free to roll. The tractor weighs 2500 lb and has a center of gravity at G. Problems 8-16/17 G B -5 ft- +-3 ft-² 2 ft O 2 ft