Block m has a mass of 16 kg. Block M has a mass of 88 kg. If there is no friction between block M and the floor and the coefficient of friction between block m and block M is 0.25, determine the force F necessary to apply to block m such that block m will not slip with respect to block M. Use g = 9. 8 N/kg.
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Block m has a mass of 16 kg. Block M has a mass of 88 kg. If there is no friction between block M and the floor and the coefficient of friction between block m and block M is 0.25, determine the force F necessary to apply to block m such that block m will not slip with respect to block M. Use g = 9. 8 N/kg.
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- Force T pulls at angle a up from the horizontal on a section of pipe of weight W as shown, but the pipe remains motionless. The coefficient of static friction between pipe and floor is µ. We know that the magnitude of the total frictional force on the pipe by the floor is: 1(c T. A) 27 cos a B) µ(W +T sin a) C) µW +T cos a D) T cosa W A BA 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 6.2 N and a vertical force P are then applied to the block. The coefficients of friction for the block and surface are ls = 0.37 and Uk = 0.22. (a) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 8. N. (b) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 10.0 N. N (c) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 12.0 N. N Submit AnswerA block of mass mį = 4.00 kg is put on top of a block of mass mp = 7.00 kg. To cause the top block to slip on the bottom one while the bottom one is held fixed, a horizontal force of at least 15.0 N must be applied to the top block. The assembly of blocks is now placed %3D on a horizontal, frictionless table (see the figure). Find the magnitudes of (a) the maximum horizontal force F that can be applied to the lower block so that the blocks will move together and (b) the resulting acceleration of the blocks. (a) Number i Units (b) Number i Units >
- In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force F A of magnitude 215 N, and Charles pulls with force F cof magnitude 181 N. Note that the direction of F cis not given. What is the magnitude of Betty's force F B if Charles pulls in (a) the direction drawn in the picture or (b) the other possible direction for equilibrium? Alex Charles 141° Betty (a) Number i Units (b) Number i UnitsThree forces act on a moving object. One force has a magnitude of 75.0 N and is directed due north. Another has a magnitude of 54.6 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with a constant velocity? Express your answer as a positive angle south of east. (a) Number i (b) Number Units UnitsProblem 6. A 6.0kg block is placed on top of a 9.0kg block. A horizontal force of 50.0N is applied at an angle to the 9.0kg block, and the 6.0kg block is tied to the wall by a rope. The coefficient of kinetic friction between the two blocks is 0.25, and the coefficient of friction between the 9.0kg block and the ground surface is 0.30. (a) Draw a free body diagram for each block and identify the action-reaction forces between the blocks. (b) Determine the tension in the rope. (c) Determine the magnitude of the acceleration of each block. 6.0kg F = 50.0N 15° 9.0kg
- A 16 kg block of steel is at rest on a horizontal table. The coefficient of static friction between block and table is 0.54. (a) What is the magnitude of the horizontal force that will put the block on the verge of moving? 84.7 N (b) What is the magnitude of a force acting upward 60° from the horizontal that will put the block on the verge of moving? X N (c) If the force acts down at 60° from the horizontal, how large can its magnitude be without causing the block to move? NA 2.220 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is µs = 0.605 and the coefficient of kinetic friction is µ = 0.255. At time t = 0, a force F = 8.10 N is m Us,k applied horizontally to the block. State the force of friction applied to the block by the table at times t = 0 and t > 0. t = 0 N t > 0 N Consider the same situation, but this time the external force F is 16.3 N. Again, state the force of friction acting on the block at times t = 0 and t > t = 0 N t > 0 N * TOOLS x10A 37.5 kg block is pushed at a constant speed up a 24.0° incline by an applied force parallel to the incline. If the coefficient of kinetic friction between the block and the incline is 0.340, find the magnitude of the applied force.
- A 5.740 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is u, = 0.555 and the coefficient of kinetic friction is µy = 0.305. At time t = 0, a force F = 19.2 N is applied F horizontally to the block. State the force of friction applied to the block by Us,k the table at times t = 0 and t > 0. t = 0 t > 0 N Consider the same situation, but this time the external force F is 38.8 N. Again, state the force of friction acting on the block at times t = 0 and t > 0. %3D t = 0 t > 0 NAn object with weight W is dragged along a horizontal plan by a force acting along a rope attached to the object. If the rope makes an angle theta with a plane, then the magnitude of the force is: F = (mu)W/((mu)sin(theta)-cos(theta)) where mu is the coefficient of friction. For what theta, F is smallest?In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force F A of magnitude 214 N, and Charles pulls with force F c of magnitude 183 N. Note that the direction of F c is not given. What is the magnitude of Betty's force F B if Charles pulls in (a) the direction drawn in the picture or (b) the other possible direction for equilibrium? Alex Charles 145° Betty (a) Number i Units (b) Number i Units >