Example involving Friction

Example: Find the range of values of P for which equilibrium of the block shown in the

figure below is maintained. The following data apply: Q = 500 N

μ_s = 0.25, μ_K = 0.20, θ = 30^o

Recall the general strategy for solving friction problems.

1.	To determine the different possibilities where motion might impend, construct a FBD for each object and for each possibility.
2.	Write the equations of equilibrium for each object and for each possibility.
3.	Solve for the forces for each case.
4.	Check results for each case to determine where motion first impends.

Click here to first examine conditions if the block tends to slide up the plane.

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