A person pushes on a stationary 125 {rm N} box with 75 {rm N} at 30^circ below the horizontal, as shown in the figure.

/in /by

A person pushes on a stationary 125 {rm N} box with 75 {rm N} at 30^circ below the horizontal, as shown in the figure. The coefficient of static friction between the box and the horizontal floor is 0.80. What is the friction force on the box?