Engineering Statics

E-19


A box is placed on an inclined plane. The weight of the box is 3.25 kN. Determine the magnitude of the force P to just start the box up the plane.

The FBD is drawn of the box.
The force equation in the x direction is written.
The force equation in the y direction is written.
The equations are set up as simultaneous equations for the calculator.
Values for the weight and coefficient of friction are substituted in and 
P and N are found.