A 5.1 kg box is slid across the floor at constant speed by a force of 25 N (40o above horizontal) as shown in the figure below. (a) How large a friction force impedes the motion of the box? (b) How large is the normal force? (c) Find the coefficient of kinetic friction.
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A 5.1 kg box is slid across the floor at constant speed by a force of 25 N (40o above horizontal) as shown in the figure below. (a) How large a friction force impedes the motion of the box? (b) How large is the normal force? (c) Find the coefficient of kinetic friction.
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- A 1.92 kg mass is sliding across a horizontal surface an initial velocity of 12.9 m/s i. If the object then comes to a stop over a time of 2.56 seconds, what must the coefficient of kinetic be? Assume that only friction, the normal force, and the force due to gravity are acting on the mass. Enter a number rounded to 3 decimal places.A crate of mass 17.0 kg rests on a level surface. If the coefficient of kinetic friction between the crate and surface is 0.410, calculate the following. (a) Calculate the normal force. (Give the magnitude.) (b) Calculate the magnitude of the kinetic friction force when a horizontal applied force of 89.0 N moves the crate. (c) Calculate the normal force when the 89.0-N applied force is exerted at an angle of 37.5° above the horizontal. (Give the magnitude.) (d) Calculate the magnitude of the kinetic friction force when the 89.0-N applied force is exerted at an angle of 37.5° above the horizontal. Need Help? Read It Read ItThe rock is hanging from the middle of a clothesline. The rope is attached at equal heights 24 units apart and the entre point sags 1 unit below them. What is the tension if he has a mass of 20kg?
- A 34.0 kg box initially at rest is pushed 5.10 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following.A box with a mass of 0.5 slugs lies on an inclined plane making an angle of 30o with the horizontal. If the coefficient of kinetic friction between the box and the plane is 0.4, what is the magnitude of the force that must be applied parallel to the incline to keep the box moving down the incline at a constant speed?A 1.57 kg mass is sliding across a horizontal surface an initial velocity of 12.9 m/s i. If the object then comes to a stop over a time of 4.23 seconds, what must the coefficient of kinetic be? Assume that only friction, the normal force, and the force due to gravity are acting on the mass. Enter a number rounded to 3 decimal places.
- A 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 box with a mass of 9.52kg, is on a ramp with an incline of angle of 23.10°. What is the coefficient of static friction?A crate of mass 17.0 kg rests on a level surface. If the coefficient of kinetic friction between the crate and surface is 0.440, calculate the following. edi ume (a) Calculate the normal force. (Give the magnitude.) (b) Calculate the magnitude of the kinetic friction force when a horizontal applied force of 91.0 N moves the crate. (c) Calculate the normal force when the 91.0-N applied force is exerted at an angle of 32.5 above the horizontal. (Give the magnitude.) (d) Calculate the magnitude of the kinetic friction force when the 91.0-N applied force is exerted at an angle of 32.5 above the horizontal.
- A 7.5 kg backpack is sliding across the floor. The coefficient of friction between the backpack and the floor is 0.20. Answer the following: Is this static or kinetic friction?A horse is harnessed to a sled having a mass of 211 kg, including supplies. The horse must exert a force exceeding 1200 N at an angle of 38.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point particle. (a) Calculate the normal force (in N) on the sled when the magnitude of the applied force is 1200 N. (Enter the magnitude.) N (b) Find the coefficient of static friction between the sled and the ground beneath it. (c) Find the static friction force (in N) when the horse is exerting a force of 6.00 ✕ 102 N on the sled at the same angle. (Enter the magnitude.)A 0.85 kg block of wood is stationary on an incline that is15◦above horizontal. A force of 3.0 N is being applied toit 75◦below horizontal, directly into the incline (the force isperpendicular to the incline). What is the minimum coefficientof static friction required to keep the block stationary?