t force that will hold the body.
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A body weighing 500N is held by a rope that passes over a horizontal drum, the angle of contact being 150°. If the coefficient of friction between the rope and the drum is 0.3 find the least force that will hold the body.
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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.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.If PCD=6000lb and PGD=1000lb (both compression), find P and Q.
- A box weighing 150lb is moved across a horizontal Floor by dragging it by means of a rope attached to the front end. If the rope makes an angle of 30° with the floor and if the coefficient of friction between box and floor is 0.400, find the force exerted by the man pulling the rope.A pull of 20 N at 30° to the horizontal is necesary to move a block of wood on a horizontal table. If the coefficient of friction between the bodies in contact is 0.25, what is the weight of the block?A 250N crate is pulled up a ramp that is angled at 20 degrees above the horizontal. If the coefficient of friction is 0.25, find the y-component of the weight.
- A load of 910 N is lying on an inclined plane, whose inclination with the horizontal is 30°. If the coefficient of friction between the load and the plane is 0.4, find the maximum horizontal force, which will keep the load in equilibrium.An elevator moves downward at a speed of 1 ft/s. If the total weight is 4500 lbf, find the cushionforce needed to stop the elevator in 2 inches. Use the rolling friction of 0.02 of the verticalweightA large box of mass m sits on a horizontal floor. You attach a lightweight rope to this box, hold the rope at an angle u above the horizontal, and pull. You find that the minimum tension you can apply to the rope in order to make the box start moving is Tmin. Find the coefficient of static friction between the floor and the box.
- Q5 A pull of 20 N at 30 ° to the horizontal is necessary to move a block of wood on a horizontal table . If the coefficient of friction between the bodies in contact is 0.25 , what is the weight of the block ?– A ring (whose mass is m, the average radius r and has a negligible thickness) is suspended on support A. If the coefficient of friction between the support and the ring is μ, a) Find the vertical P force that can slide the ring on the support. b) What is the value of the angle β when the ring is on the verge of slide?A 360-kg block is resting on a 23 deg inclined plane with a coefficient of friction = 0.47. Find the required horizontal force P (kN) that is necessary to start the block UP the incline.