A lightweight rope is wrapped around a 25-lb drum . The coefficient of that is 3 ft in diameter (see Fig. friction between the drum and the ground is 0.30. Deter- mine whether or not the drum is in equilibrium. 40° 30°
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- A 1.1-kg disk A is placed on the inclined surface. The coefficient of static friction between the disk and the surface is 0.35. Is the disk in equilibrium if P=5.5N and =30?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 block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the smallest force P and the corresponding angle that would cause impending sliding of the block. The angle of static friction between the block and the ground is s.
- A wedge is used to prop up the 6000-lb block of marble. The wedge angle is =30, and the angle of static friction is s=12 between all contact surfaces. Determine the smallest force P that would prevent the wedge from sliding out.The center of gravity of the nonhomogeneous bar AB is located at G. Find the angle at which the bar will be in equilibrium if it is free to slide on the frictionless cylindrical surface.Two loads P1 and P2 resting on two inclined plane and connected by a horizontal chord AB as shown in figure. If P2 = 1200 kN determine the maximum and minimum value of P1 and tension in chord AB so that the static equilibrium exist the angle of limiting friction is 23o at all rubbing surfaces.
- Block A weighing 6 kN rests on a horizontal plane and supports on top of it another block of weight 1 kN as shown in Fig. 11-(i). Block B is attached to a vertical wall by an inclined string which makes an angle of 30o with the horizontal. What should be the value of horizontal force P to cause the motion of the lower block to impend? Take μ=0.30 for all the surfaces.A 3000 N block is placed on an inclined plane as shown in Figure. Find the maximum value of W for equilibrium if tipping does not occur. Assume coefficient of friction as 0.2.An 800 N-m couple is applied to the flywheel as shown. The coefficient of belt friction is 0.20. The minimum force P required to prevent rotation of the flywheel is applied. a.) Which Tension is larger, Ta or Tb? Explain b.) What is the angle of contact in radians? c.) What is the value of the ratio Ta/Tb? Please answer these , with FBD and solutions please.
- A ladder, 8 m long and having a mass of 25 kg, rests on a horizontal floor and is supported by a vertical wall. The ladder is inclined 62°, as shown, and starts to slip when a person having a mass of 73 kg has climbed halfway up it. The coefficient of friction at the wall is 0.20. Assume the weight of the ladder to be concentrated at its midpoint. Calculate the coefficient of friction at the floor. - Draw a free-body diagram - Solve most simple wayA boom hinged at the base of a vertical mast is used to lift a 2000 load. Find the tension in the cable and the reaction R the end of the boom. The angle of the boom is 40 degrees with the horizontal and the cable is 60 degrees with the vertical mast. Show complete solution including FBD.a uniform ladder 8 meters long and weighing 350 N rest against a smooth vertical wall at an angle of 30° to the wall. A 700-N man stands 6 meters up from the bottom of the ladder. Find the horizontal force necessary at the base to keep the ladder from slipping. note: please show free body diagram