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The blocks shown in the figure are connected by flexible cable passing over frictionless pulleys. At 300-lb block, the coefficients of friction are Us = 0.30 and Uk = 0.20 while at 200-lb block are Us = 0.40 and Uk is 0.30. Compute the magnitude and direction of the friction force acting on each block.
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- A 1,280-N crate is being pushed across a level floor at a constant speed by a force F of 270 N at an angle of 20.0° below the horizontal, as shown in the figure a below. (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.)(b) If the 270-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a).m/s2A block with a mass m is pushed up an inclined rough surface by a horizontal force F as shown. If the block is being pushed up at a constant speed, find the magnitude of the applied force F, given that theta =35 degrees , m = 5 kg, and the kinetic frictional coefficient between the block and the inclined surface mu_k = 0.2A heavy sled is being pulled by two people. The coefficient of static friction between the sled and the ground is 0.635, and the kinetic friction coefficient is 0.395. The combined mass of the sled and its load is 351 kg. The two ropes are separated by an angle of 21 degrees. They make an angle of 32.4 degrees with the ground. Assuming both ropes pull equally hard, what is the minimium rope tension (not combined tension) to get the sled moving?
- A 5N horizontal force is applied to the block, pushing toward the right, but the block does not move. If coefficient of static friction is 0.1 and object mass is 20 Kg, what is the force of static friction of the surface on the block. (Take g=10 m/s^2)If a force is applied with a magnitude of 200 N at 30 degrees above the horizontal, what are the horizontal and vertical components of this force? Group of answer choices Fa,h= 136.667 N Fa,v= 87.334 N Fa,h= 200 N Fa,v= 200 N Fa,h= 173.2 N Fa,v= 100 N Fa,h= 150 n Fa,v= 50 NA 10.0 kg object is pushed across a floor with a horizontal force of 70.0 N. If the coefficient of kinetic friction between the object and the floor is 0.100, what is its acceleration?
- If the mass of the block is M -3.8 kg, what is the magnitude of the frictional force ?A 1,480-N crate is being pushed across a level floor at a constant speed by a force F of 320 N at an angle of 20.0° below the horizontal, as shown in the figure a below. F 20.0° 20.0° (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 320-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what willI be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). |m/s²A block with a mass of 6.18kg slides down a ramp inclined at 30.0o. The coefficient of kinetic friction between block and ramp is uk=0.490. The kinetic friction force acting on the block as it slides has a magnitude of ________N.
- A block weighing 38 kg is on an incline with a slope of 17o. If the block is at the verge of sliding down the incline, what is the static frictional force of resistance? A block weighing 25 kg is on an incline with a slope of 28o. If the block is at the verge of sliding down the incline, what is the static friction coefficient?A block with mass m is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope and the pulley may be considered ideal. The coefficient of static friction between the block and the plane is ps; and the coefficient of kinetic friction is uk. If the rope were cut between the block and the pulley, which of the following equations can be used to calculate the magnitude of the acceleration of the block down the plane? (Hint: draw free body diagram). g-Hk cos(e)) Og- P sin(0) Og Og(tan(0) Hk sin(@)) Og(sin(0)- u cos(0))If a 3kg box is moving down a ramp with ramp angle 15° and a friction coefficient μk of 0.4, what is the magnitude of the force of friction on the box (in N)?