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 0.4 N 30° 60°

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