Static Equilibrium of climbing harness

[patelkey]

Homework Statement

a climber with a weight of 734.2 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are θ = 36.5° and ϕ = 29.0°. If her feet are on the verge of sliding on the vertical wall, what is the coefficient of static friction between her climbing shoes and the wall?

Homework Equations

I tried using cosine(theta)/sin(theta) but this did not work.

The Attempt at a Solution

I tried using cosine(theta)/sin(theta) but this did not work.

 

[tiny-tim]

Hi patelkey!

(have a theta: θ )

I tried using cosine(theta)/sin(theta) but this did not work.

hmm … you can't just use formulas for no reason, and hope that they work, and that the computer will accept them.

Draw a vector triangle for all the forces …

what do you get? ​