- #1
fredrogers3
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Homework Statement
I have found the question I am having trouble with here:
http://www.chegg.com/homework-help/questions-and-answers/block-mass-m-rest-surface-incline-adistance-h-10cm-base-height-incline-ish-50cm--coefficie-q218123
Homework Equations
See below
The Attempt at a Solution
After doing my free body diagram, I picked the vertical axis to be y and the horizontal axis to be r.
Force total in the r direction= Fnsinθ-Ffrcosθ= m((v^2)/r)
In the y direction, = Ffrsinθ + FnCosθ-mg=0, b/c a=0
If this box is not to be in motion, then the sum of these forces should be zero. I set the two equations = to zero, while solving for v, but it did not come out to the 1.8 that is given as a solution. Are my components at least correct? If so, where am I going wrong?
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