The 300-lb block shown in the figure is kept from sliding down the inclined plane by friction and a force of smallest magnitude F. If the coefficient of friction between the block and the inclined...

Extracted text: The 300-lb block shown in the figure is kept from sliding down the inclined plane by friction and a force of smallest magnitude F. If the coefficient of friction between the block and the inclined plane is 0.4, then the magnitude of the frictional force is 0.4N, where N is the magnitude of the normal force exerted on the block by the plane. If the system is in equilibrium, use Cramer's rule to solve for F and N. 300 lb F 0.4 N N 30° 60°