Equilibrium and find static friction

PAstudent · Nov 10, 2015

Homework Statement

Handwritten worked solution on a printed textbook page for problem 34: a plank leaning on a frictionless pipe, with force along the plane g sin θ = (9.81 m/s²)(sin 38.0°) = 6.04 N, horizontal component 4.76 N, vertical component g cos θ = 7.72 N, and static friction 4.76 N / 7.72 N = 0.615.

Homework Equations

The Attempt at a Solution

I had someone help me with this problem (not on here) and their process and units don't seem to match to me. Or is this correct?

haruspex · Nov 10, 2015

That solution is clearly not right. It makes no use of the given dimensions, and these are easily seem to be relevant.
As required by the forum rules, please now post your attempt at a solution. Start with listing the standard equations you know which are likely to be relevant.

Equilibrium and find static friction

Homework Statement

Homework Equations

The Attempt at a Solution

Discussion

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