Homework Help: Physics

Posted by Ariana on Monday, November 19, 2012 at 7:03pm.

A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 56° with the horizontal. The coefficient of static friction between the ladder and the ground is 0.36. If your mass is four times that of the ladder, how high can you climb before the ladder begins to slip?

Physics - PayDay, Monday, November 19, 2012 at 7:09pm
msFn = Fw; Fn = 5mg; Fw = 2.25mg
FwL sin 60
o
= (mgL/2 + 4mgx)cos 60
o
= 2.25mgL sin 60
o
x = 0.85L; you can go 85% of the way to the top
Physics - PayDay, Monday, November 19, 2012 at 7:12pm
LOL, I got the wrong picture out the solutions manual. That's how you solve it though, just substitute the values.

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