Physics

A uniform ladder of mass (m = 14.5 kg) and length (L) leans against a frictionless wall, see figure. Find the static friction force between the ladder and the floor if the angle θ = 64.0°?

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  1. consider the point where the ladder meets the wall. Sum moments about that point.

    mg*1/2 *L*cos64-mu*mg*L sin64=0

    solve for mu. Notice the weight of the ladder mg divides out, as does length L.

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    bobpursley
  2. I did that work got .197 but its wrong

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