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Homework Statement:
 A 400N woman climbs a 100N, 10m ladder inclined at an angle of Θ = 60°. When she is 3m away from the wall, how much friction is needed at point A to keep the ladder from slipping. (Assume theres no friction between wall and ladder.) (Answer 342N)
Homework Equations:

Fground = mg + mdg
Fn = Ffriction
Torque = Fn(d3) mg(d2)  m2g(d1)
I set up all my summations and ended with Fnormal = ((mg1d1) + (m2gd2)) / d3. The values I put in were ((400 x 2) + (100 x 5cos60)) / 10sin60.
I got 121.243 N as my answer but that is incorrect. What did I do wrong?
I got 121.243 N as my answer but that is incorrect. What did I do wrong?