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A uniform ladder of mass (m = 14.0 kg) and length (L) leans against a frictionless...

A uniform ladder of mass (m = 14.0 kg) and length (L) leans against a frictionless wall, see figure. If the angle θ = 60.0°, find the static friction force between the ladder and the floor when a 60.0-kg person stands two-third of the way up the ladder?

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Answer #1

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Rw is the normal reaction at the wall

Take moment about base of ladder

Cancel L

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Consider all horizontal forces

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