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April 20, 2014

April 20, 2014

Posted by **Jul** on Wednesday, November 9, 2011 at 5:59pm.

can some1 plz explain this to me?

- physics -
**drwls**, Wednesday, November 9, 2011 at 6:25pmTo start the crate sliding down the incline, you must provide a force component in that direction that exceeds the maximum static friction force minus the weight component in that direction.

When the two forces are equal,

M g cos 19.5 * Us = M g sin 19.5 + 537 cos19.5

where Us is the static friction coefficient.

Solve for Us

- physics -
**Jul**, Wednesday, November 9, 2011 at 8:33pmcould you clarify what M is? i know g is the gravity which will be 9.81 but im not sure about the M

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