A box is at a horizontal surface with a coefficient of friction of 0.15. Determine the weight of the box if the frictional force is 2kN
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- The normal pressure acting on the disk of the sander is given by p=(4/3)+(r2/6), where p is the pressure in pounds per square inch (psi) and r represents the radial distance in inches. Determine the torque C required to operate the sander at constant speed if the kinetic coefficient of friction for the surface being sanded is 0.86.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.Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair is denoted by G. The coefficient of static friction is 0.2 at B (the contact point between the chairs) and 0.35 at A, C, and D. Determine the smallest force P that would cause sliding.
- A body of mass 30 kg is resting on a horizontal plane. A pull of 80 N is subjected on the body and tends the body to move. Will the body move if coefficient of friction between the body and the plane is 0.3.A 50 kg box is pushed up an inclined plane at a constant speed. The coefficient of friction between the box and the plane is 0.4. Determine the efficiency of the plane which is 6 meters long and angled at 40owith the horizontal.A 150 lb man can climb up15 ft on a 20 ft ladder before it slips. What must the coefficient of friction be if the ladder is arranged so that its base makes an angle of 50 ̊ with the ground? Assume the ladder to be uniform and weighing 100 lb.
- body resting on a rough horizontal plane requires a pull of 300 N inclined at 40º to the horizontal plane just to move it. It is found that a push of 150 N inclined at 40o to the x-axis can also make the body to move. Determine the weight of the body and the coefficient of friction.The weight of the motorcycle is 151 kg and the weight of the driver is 64 kg. Dimensions: l1 = 0,31 m and l2 = 0,23 m Determine the required frictional force.The system is used to lift a block with mass 300 kg. If the friction coefficient between twoblocks, and between a block and a surface, are 0.20 and 0.35, respectively, what is the minimum force Prequired such that the object is about to be lifted? Assume weights of the blocks to be negligiblecompared to lifted weight. (g=9.81)
- A 85-kg man starts climbing a ladder that leans against a wall as shown in Figure Q1. If the ladder is 5 m long and weighs 10 kg. Determine how far up the ladder the man can climb (in m) before the ladder starts to slip if the coefficient of friction is 0.25 at the top vertical surface and 0.4 at the bottom horizontal surface.A block with a mass of 100 kg slides down an inclined surface that is 5 m long and makes an angle of 25° with the horizontal. A man pushes horizontally on the block so that it slides down the incline at a constant speed. The coefficient of friction between the block and the inclined surface is 0.15. Determine The work done on the block by the inclined surface.A block with a mass of 100 kg slides down an inclined surface that is 5 m long and makes an angle of 25° with the horizontal. A man pushes horizontally on the block so that it slides down the incline at a constant speed. The coefficient of friction between the block and the inclined surface is 0.15. Determine The work done on the block by gravity.