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greenday101

  • 4 years ago

A 25 kg box rests without sliding on a loading ramp at an angle of 30 degrees. What is the coefficient of friction between the box and the ramp? I know the answer is .58 but I'm not sure how to do this.

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  1. elica85
    • 4 years ago
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    \[F _{static}=\mu mg\] on a horizontal surface

  2. elica85
    • 4 years ago
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    on an angle... \[F _{static}=\mu mgcos \Theta\] not sure where to go from here without additional info. nothing else was given?

  3. greenday101
    • 4 years ago
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    I figured it out. tanΘ=tan(30)=.577

  4. elica85
    • 4 years ago
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    0_o huh

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