A 479-N Crate Rests on an Ramp;the Maximum Angle Just

question 34

Multiple Choice

A 479-N crate rests on an ramp;the maximum angle just before it slips is 20° with the horizontal.What is the coefficient of static friction between crate and ramp surfaces?

• A) 2.75
• B) 0.58
• C) 1.73
• D) 0.36
• E) ​0.72

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