A chair weighing 145 N rests on a level floor that is not frictionless. A man pu

Question

A chair weighing 145 N rests on a level floor that is not frictionless. A man pushes on the chair with a force F = 42.0 N that is directed at an angle of 41.0degree with the horizontal.(Figure 1.) Assume that the chair is stationary but is on the verge of sliding. 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. Coefficient of static friction between the chair and the floor What is the coefficient of static friction, mus between the floor and the chair? Recall that the chair is on the verge of sliding. Express your answer numerically to three significant figures.

Explanation / Answer

the forces in the y direction N - mg - Fsin41=0 isolate n, N=mg+Fsin41 plug in the numbers and you get N=145+42sin41 = 172.55 N

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