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A carpenter attempts to push a sanding block across the wooden board. The maximum static friction between the sanding block and the wooden board is 25N. What is the sanding block's acceleration in the x direction if the carpenter pushes the block with a force of 20N.
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- A crate of mass 61 kg lies on a flat floor. A person exerts a horizontal force of 141 N on it. If the crate doesn’t move, what’s the magnitude of the static friction force?A large crate has a mass of 120 kg and sits on a horizontal floor. You push on the crate with a horizontal force of 550 N, but the crate does not move. The coefficient of static friction between the crate and the floor is 0.6. What is the magnitude of the static frictional force acting on the crate?You managed to pull a heavy crate up a ramp on a truck. The crate has mass 47 kg. You were pulling with 464 N of force along the ramp while the ramp made an angle of theta=25.0 degrees with the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.45. What is the acceleration of the crate along the ramp?
- Two horses pull a cart with a total applied force of 1000N. The kinetic friction from the gravel road has a value of 375 N. Assuming the cart is 200kg, what is the acceleration of it?The road is flat and the horses are traveling in a straight path.A horse pulls a box of mass M = 55 kg across a rough horizontal surface by applying a horizontal force of 874 N.If the coefficient of kinetic friction between the box and the surface is μk = 0.5, what is the acceleration of thebox?A crate is pushed across a horizontal surface by the applied force shown in the figure. The magnitude of the force F = 24.1 N, 0 = 27.9°, the coefficient of kinetic friction between the block and the surface is 0.4, and M = 2.49 kg, what is the magnitude of the acceleration of the crate in m/s?
- A 12.1 kgkg box sits on a horizontal table. A string with tension 30.6 NN pulls on the box to the right, but static friction between the box and the table prevents the box from moving. The coefficient of static friction between the box and the table is 0.43. What is the magnitude of the static friction force on the box?You are pushing a metal crate against a metal floor. The two surfaces have a static coefficient of friction of 0.62 and a kinetic coefficient of friction of 0.50. The floor is horizontal, and the crate has a mass of 25.0 kg. What is the minimum force you need to apply to get the crate moving from rest? Give your answer in units of N, to three significant figures.A sled is held on an inclined plane by a cord pulling directly up the plane. The sled is to be on the verge of moving up the plane. The magnitude F required of the cord's force on the sled is plotted versus a range of values for the coefficient of static friction between sled and plane. The values are below: F1 = 2.0 N, F2 = 5.0 N for a coefficient of static friction is 0.25. At what angle (in degrees) is the plane inclined? F F -Hs
- You managed to pull a heavy crate up a ramp on a truck. The crate has mass 48 kg. You were pulling with 464 N of force along the ramp while the ramp made an angle of theta=29.5 degrees with the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.45. What is the acceleration of the crate along the ramp? FATwo workers are sliding 390 kg crate across the floor. One worker pushes forward on the crate with a force of 450 NN while the other pulls in the same direction with a force of 290 NN using a rope connected to the crate. Both forces are horizontal, and the crate slides with a constant speed. What is the crate's coefficient of kinetic friction on the floor?A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mass ma and makes his way over the ledge (see the figure). If the coefficient of maximum static friction between the rock and the ground is µ, and the mass of the hiker is mâ, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. mc = Ju