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January 28, 2015

January 28, 2015

Posted by **Chloe** on Tuesday, November 3, 2009 at 1:46am.

Any help would be great, thanks for your time!

- Physics -
**drwls**, Tuesday, November 3, 2009 at 1:59amWhen there is no acceleration, the friction force (M g cosA *mu) equals the component of the weight in the direction down and parallel to the incline (M g sin A).

Therefore mu = sin A/cos A = tan A

Apply that equation both at the maximum ramp angle before slipping (in which case mu is the static friction coefficient) and the ramp angle that results in constant velocity (in which case mu is the kinetic friction coefficient).

- Physics -
**Jessica**, Tuesday, November 3, 2009 at 2:02amSo static: 0.73 and kinetic: 0.57, thanks!

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