The 633-N force is applied to the 106-kg block, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the block. The force is positive if to the right, negative if to the left. P = 633 N 38° H = 0.66 H = 0.43
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- The 592-N force is applied to the 100-kg block, which is stationary before the force is applied. Determine the magnitude and direction of the friction force Fexerted by the horizontal surface on the block. The force is positive if to the right, negative if to the left. P = 592 N 31° Hg = 0.76 Hk = %3D = 0.57 Answer: F = NA 4.00-kg block is sent up a ramp inclined at an angle 0 = 29.0° from the horizontal. It is given an initial velocity VO = 15.0 m/s up the ramp. Between the block and the ramp, the coefficient of kinetic friction is k coefficient of static friction is μg = 0.60. = 0.40 and the What distance D along the ramp's surface does the block travel before it comes to a stop? D = m %A damp washcloth is hung over the edge of a table to dry. Thus, part (mass = mon) of the washcloth rests on the table and part (mass= moff) does not. The coefficient of static friction between the table and the washcloth is 0.484. Determine the maximum fraction [moff/mtotal] that can hang over the edge without causing the whole washcloth to slide off the table. Number i Units
- a wooden block is at rest on a wooden inclined plane. As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the planeTwo blocks are supported by a pulley along an incline as shown. The lower block B has a weight of 30 lbs and the higher block A has a weight of 20 lbs. Assume that there is friction between the blocks with Hs = 0.15 and assume no friction between block Band the incline. Determine the angle z for which motion is impending. 201b 301b A Tension in block A as a function of z can be written as TA %3D Tension in block B as a function of z can be written as Tây Thus, impending motion is at z = degrees.The coefficient μ of kinetic frictions depends on the surfaces in contact and their conditions, while the coefficient μ of static frictions does not depend on the surfaces conditions. a) Trueb) False
- Determine the force P necessary to start the V-shaped wedge to the right if the coefficient of friction is f = 0.445 at each of the three surfaces of contact. WB =1000N WA=200N B 30% 150Determine the magnitude and the direction cosines of a force which as x , y, and z component of −3 NN, −1 N, and 6 N respectively.Magnitude = in N cosα= cosβ= cosγ=Problem 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
- The 8-kg block A is attached to link AC and rests on the 12-kg block B. Knowing that the coefficient of static friction is 0.2 between all surfaces of contact and neglecting the mass of the link. с OA B Draw the FBD(s) for block A and block B. -50 NDetermine the minimum value of weight W which may be applied without causing the 50-lb block to slip. The coefficient of static friction between the block and the plane is µ; = 0.2, and between the rope and the drum D µ3 = 0.3. W 45°7. ssm mmh The drawing shows a plane diving toward the ground and then climbing back upward. During each of these motions, the lift force L acts perpendicular to the displacement 3, which has the same magnitude, 115° 75° (a) Dive w (b) Climb 1.7 x 10° m, in each case. The engines of the plane exert a thrust T, which points in the direction of the displacement and has the same magnitude during the dive and the climb. The weight W of the plane has a magni- tude of 5.9 × 10ʻ N. In both motions, net work is performed due to the combined action of the forces L, T, and W. (a) Is more net work done during the dive or the climb? Explain. (b) Find the difference between the net work done during the dive and the climb.