A 200-Kg Box Is Placed on a Ramp

question 22

Multiple Choice

A 200-kg box is placed on a ramp.As one end of the ramp is raised,the box begins to move downward just as the angle of inclination reaches 18.0°.What is the coefficient of static friction between box and ramp?

• A)0.42
• B)0.32
• C)3.1
• D)0.27
• E)62

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