Ladder Problem

Solving a static equilibrium problem involving torque.
0:00 intro
1:20 identifying forces
2:40 distances involved
3:02 making a clear diagram
4:06 drawing component vectors
5:08 picking a point to calculate a torque
7:24 finding the friction force
7:58 getting the bottom normal force
8:34 calculating the coefficient of friction
9:04 overview and summary of the solution