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- The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016, determine the force F required to advance the bar at a constant speed.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 inclined ladder AB supports a house painter (85 kg) at C and the weight iq = 40 K/m} of the ladder itself. Each ladder rail (t5= 4 mm) is supported by a shoe (ts= 5 mm) that is attached to the ladder rail by a bolt of diameter d = 8 mm
- B L= 10' A 400 lb 77 A uniform bar AB, 10ft long and weighing 280lb, is hinged at B and rests upon a 400lb block at A as shown. If the coefficient of friction is 0.40 at all contact surfaces, find the horizontal force P required to start moving the 400 Ib block.Two blocks of mass Mi and M2 are connected by a massless string that passes over a massless pulley as shown in the figure. M, has a mass of 8.25 kg and rests on an incline of 0, = 59.5. M, rests on an incline of 02 = 23.5. %3D M2 Find the mass of block M2 so that the system is in M. equilibrium (i.e., not accelerating). All surfaces are frictionless. Figure is not to scale. kg M2 =The mechanism in the figure below is designed to maintain the horizontal position of the load while lifting it up.The pin located around the outer circumference of the r cm diameter pulley can slide frictionlessly in the channel on the ABC arm.The length of each of the ABC and DE arms is r cm and the weight of the lifted load is m kg.The mechanism is lifted upwards by pulling the rope wrapped around the pulley. The force P required to be applied to the rope to keep the load b cm above the ground and all the forces acting on the ABC arm Please specify. а ст P. с ст b cm а ст a=34cm ,b=68cm , c=20cm ,r=93cm ,m=110kg
- M, M2 e friction The figure above illustrates a system comprising a rigid support structure having a cross-sectional shape of a right-triangle. The angle at the top is equal 90° and the angle on the lower-left is 0. The bottom side (hypotenuse) is horizontal and the two remaining sides serve as left-side and right-side inclined planes. A 1ª block having mass Mi is positioned on the left-side inclined plane and a 2nd block having mass M2 is positioned on the right-side inclined plane. An ideal rope under tension T extends from the 1st block parallel to the left-side plane toward an ideal fixed-axis pulley located at the top of the structure. The rope extends over the pulley and then continues parallel to the right-side plane to the 2nd block. The right-side plane is friction-less but the left-side plane has a coefficient of static frietion(a) A body of weight 55 N is placed on a rough horizontal plane. To just move the body on the horizontal plane, a push of 25 N inclined at 10° to the horizontal plane is required. Find the coefficient of friction. C (b) Determine the number of members in a structure, if the total number of joints in the structure is 5. :M, M2 R friction The figure above illustrates a system comprising a rigid support structure having a cross-sectional shape of a right-triangle. The angle at the top is equal 90° and the angle on the lower-left is 0. The bottom side (hypotenuse) is horizontal and the two remaining sides serve as left-side and right-side inclined planes. A 1ª block having mass Mi is positioned on the left-side inclined plane and a 2nd block having mass M2 is positioned on the right-side inclined plane. An ideal rope under tension T extends from the 1* block parallel to the left-side plane toward an ideal fixed-axis pulley located at the top of the structure. The rope extends over the pulley and then continues parallel to the right-side plane to the 2nd block. The right-side plane is friction-less but the left-side plane has a coefficient of static friction (S). All parts of this system are remaining at rest. a) Provide a list of the magnitudes of the forces acting on the 1t block, using symbolic names or…
- As shown in the below figure, two blocks each weighing 1.5 kN are connected by a uniform horizontal bar which weighs 1.0 kN. If the angle of friction is 15° under each block, find P directed parallel to the 45° incline that will cause impending motion to the left.Q.) The ladder as shown in figure (2) has a long 15 ft and weighs 50 B. It rests against a vertical wall and horizontal floor as shown in figure (2), what must the coefficient of friction p be for equilibrium?, then discuSN your results. Lakder Figure (2):Provide a very clear and complete solution as well as diagram. A pulley 600 mm in diameter transmits 40 KW at 500 rpm. The arc of contact between the belt and pulley is 144 degrees, the coefficient of friction between belt and pulley is 0.15 and the safe working stress of the beltis 2.1 Mpa. Determine the belt tension ratio, neglecting the effect of centrifugal force. A. 2.41 B. 2.44 C. 1.458 D. 4.1