Determine the force P need to cause motion to impend f applied to the block if the coefficient of static friction between the block and the floor is 0.20.
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- An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 1090 N. The coefficient of static friction between the box and the floor is 0.330. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number i (b) Number i Units UnitsThe coefficient of static friction between a block of mass m and an incline is = 0•3. (a) What can be the maximum angle e of the incline with the horizontal so that the block does not slip on the plane ? (b) If the incline makes an angle 8/2 with the horizontal, find the frictional force on the block.Body A has a mass of 25 kg and body B has a mass of 50 kg. The coefficient of friction for all surfaces is 0.20. Find the minimum force P that can be applied to B without disturbing the equilibrium of the system.
- An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 876 N. The coefficient of static friction between the box and the floor is 0.410. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number i Units (b) Number UnitsAn initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 1110 N. The coefficient of static friction between the box and the floor is 0.430. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number i (b) Number i Units UnitsA 375-lb block rests on a rough plane inclined 35o with the horizontal. If thecoefficients of friction between the block and the plane are 0.58 for static and 0.3 for kinetic respectively, determine whether or not the block is at rest.
- 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 5.00-kg box is initially at rest on a level surface. The coefficient of static friction between the box and the surface is 0.400. Calculate the maximum force you can apply before the box starts to move, if the force is directed at an angle of 30 degrees from the horizontal, with the vertical component downward. Calculate the maximum force you can apply before the box starts to move, if the force is directed at an angle of 30 degrees from the horizontal, with the vertical component upward.An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 797 N. The coefficient of static friction between the box and the floor is 0.330. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number i Units (b) Number Units
- 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?An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 852 N. The coefficient of static friction between the box and the floor is 0.490. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number i Units (b) Number i UnitsAn initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 769 N. The coefficient of static friction between the box and the floor is 0.410. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number Units (b) Number i Units