A Person Is Pushing on a Box Exerting a Force

question 151

Multiple Choice

A person is pushing on a box exerting a force of magnitude P, as shown in the figure.Earth exerts a force W on the box.The push is directed at an angle θ below the horizontal,and the box remains a rest.The box rests on a horizontal surface that has some friction with the box.The force that the surface exerts on the box perpendicular to the surface is equal to

• A)W.
• B)W + P.
• C)W + P cos θ.
• D)W + P sin θ.
• E)W - P sin θ.

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