A 250-N Force Is Directed Horizontally as Shown to Push

question 9

Multiple Choice

A 250-N force is directed horizontally as shown to push a 29-kg box up an inclined plane at a constant speed.Determine the magnitude of the normal force, F_N, and the coefficient of kinetic friction, µ_k. F_N µ_k

• A)330 N 0.31
• B)310 N 0.33
• C)250 N 0.27
• D)290 N 0.30
• E)370 N 0.26

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Definitions:

Pleural Cavity

The thin fluid-filled space between the two pulmonary pleurae (visceral and parietal) of each lung.

Pus

a thick, yellowish or greenish opaque liquid produced in infected tissue, consisting of dead white blood cells and bacteria with tissue debris and serum.

Mediastinum

The central compartment of the thoracic cavity between the lungs, containing the heart, trachea, esophagus, and other structures.

Thoracic Cavity

The part of the body enclosed by the ribs, home to organs such as the heart and lungs.