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April 16, 2014

April 16, 2014

Posted by **natali** on Sunday, November 11, 2007 at 1:46am.

im thinking 100*0.40=40 degrees? can someone tell me if this is right or give me the formula as to how to get it right?

- Physics -
**drwls**, Sunday, November 11, 2007 at 3:53amNo, that is not right. You can't multiply a force (100 N) by a dimensionless number (0.4) and end up with degrees.

You need to write a moment balance equation for for the ladder an angle of tilt that causes the friction force on the floor to equal the maximum static friction, which is 0.40^100 = 40 N

Write an equation for the total moment about the point where the ladder touches the wall, and set that moment equal to zero. Three terms will contribute: the ladder's mass acting through the center of the ladder, a horizontal friction force of 40 N, and an upward force at the wall of 100 N.

- Physics -
**Ashley**, Sunday, November 13, 2011 at 12:36am?

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