A 400-N Crate Rests on a Ramp;the Maximum Angle Just

question 35

Multiple Choice

A 400-N crate rests on a ramp;the maximum angle just before it slips is 15.0° with the horizontal.What is the coefficient of static friction between crate and ramp surfaces?

• A)3.7
• B)0.47
• C)2.1
• D)0.27
• E)0.40

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