The crate, which has a mass of 140 kg, is subjected to the action of the three forces shown in the figure. If it is originally at rest, determine the friction force when P1 = 750 N, P, = 900 N, P3 = 500 N and 0 = %3! %3! 25°. Assume the coefficient of kinetic friction between the crate and the surface is Hk = 0.40. %3! P2 P1 P3

The crate, which has a mass of 140 kg, is subjected to the action of the three forces shown in the figure. If it is originally at rest, determine the friction force when P1 = 750 N, P, = 900 N, P3 = 500 N and 0 = %3! %3! 25°. Assume the coefficient of kinetic friction between the crate and the surface is Hk = 0.40. %3! P2 P1 P3

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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Question

The crate, which has a mass of 140 kg, is
subjected to the action of the three forces
shown in the figure. If it is originally at
rest, determine the friction force when P1.
= 750 N, P, = 900 N, P3 = 500 N and 0 =
25°. Assume the coefficient of kinetic
!!
friction between the crate and the surface
is µk = 0.40.
P2
P1
P3

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