The force P is applied to the 38-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=113 N, and (c) P=178 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 μ, = 0.19 and μ = 0.16, respectively. The friction force is positive if up the incline, negative if down the incline. 38 kg 12° Answers: 15- P.=0.19 P₁ = 0.16

The force P is applied to the 38-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=113 N, and (c) P=178 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 μ, = 0.19 and μ = 0.16, respectively. The friction force is positive if up the incline, negative if down the incline. 38 kg 12° Answers: 15- P.=0.19 P₁ = 0.16

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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