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cdsnig
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Homework Statement
A 36kg girl slides down a slide that is 4.5m long. At the bottom of slide she is moving at 3 m/sec. If slide is inclined at 35 degrees find the coefficient of friction between slide and girl.
Homework Equations
Ff = μ*Force normal
Total energy = KE + PE
KE = 1/2 mv^2
PE = mgh
Total energy = F cosθ
The Attempt at a Solution
KE = 162 using above formula, PE = 911.15. Total energy = 1073.15
F = 1310.32 using the cosθ formula.
And that is where I am stuck - is the F the normal force or the Ff (from friction) how would I solve for the coefficient from this point? And have I even approached it in the right way so far?