A person pushes on a stationary 125 N box with 69N at 30degrees below the horizontal, as shown in the figure. The coefficient of static friction between the box and the horizontal floor is 1.20
A. What is the normal force on the box?
B. What is the friction force on the box?
C. The person now replaces his push with a 69N pull at 30degrees above the horizontal. Find the normal force on the box in this case.