) A 1.57 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 9.68 N and a vertical downward force P are then applied to the block. The coefficients of friction for the block and surface are Us = 0.4 and µk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a) 4.71 N and (b) 9.42 N (c) If the force F starts to increase gradually from 0 to 9.68 N Plot the graph for the friction force vs time for part (a) and (b).
) A 1.57 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 9.68 N and a vertical downward force P are then applied to the block. The coefficients of friction for the block and surface are Us = 0.4 and µk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a) 4.71 N and (b) 9.42 N (c) If the force F starts to increase gradually from 0 to 9.68 N Plot the graph for the friction force vs time for part (a) and (b).
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter7: Dry Friction
Section: Chapter Questions
Problem 7.71P: The 600-lb cable spool is placed on a frictionless spindle that has been driven into the ground. If...
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