A Person Is Dragging a Packing Crate of Mass 100

question 30

Multiple Choice

A person is dragging a packing crate of mass 100 kg across a rough horizontal floor where the coefficient of kinetic friction is 0.400.He exerts a force F sufficient to accelerate the crate forward.At what angle above horizontal should his pulling force be directed in order to achieve the maximum acceleration?

• A) 21.8°
• B) 27.7°
• C) 30°
• D) 34.5°
• E) 45°

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Definitions:

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