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Learning Goal: To understand the role of friction in a state of equilibrium. A chair weighing 90.0 N rests on a level floor that is not frictionless. A man pushes on the chair with a force F = 45.0 N that is directed at an angle of 39.0 with the horizontal. (Eigure 1) Assume that the chair is stationary but is on the verge of sliding. Figure < 1 of 1 -

Y Part A - Normal force exerted on the chair by the floor Using Newton's laws, calculate N, the magnitude of the normal force that the floor exerts on the chair. Express your answer numerically to three significant figures in newtons. View Available Hint(s) VO AEQ vec ? N- N N Submit Part B - Coefficient of static friction between the chair and the floor What is the coofficlont of static friction, f. between the floor and the chair? Recall that the chair is on tho verge of sliding Express your answer numerically to three significant figures. ► View Available Hint(s) Va] ΑΣΦ | ir vec o 2 ? Hs Submit