The force Pis applied to the 48-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 229 N, and (c) P = 354 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are U, = 0.34 and pk = 0.30, respectively. The friction force is positive if up the incline, negative if down the incline.
The force Pis applied to the 48-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 229 N, and (c) P = 354 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are U, = 0.34 and pk = 0.30, respectively. The friction force is positive if up the incline, negative if down the incline.
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 7.72P
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The force P is applied to the 48-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 229 N, and (c) P = 354 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are μs = 0.34 and μk = 0.30, respectively. The friction force is positive if up the incline, negative if down the incline.
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