Problem A12: A ladder, weight W, leans up against a wall. There is no friction between the wall and the ladder, but there is friction between the ladder and the floor. The top of the ladder is a distance n2 from the floor, and the bottom of the ladder is a distance n1 from the wall. What is the magnitude of the frictional force f, directed towards the wall, that the floor exerts on the ladder. If f = W/n3, what is n3? Note, n1 and n2 have the same units of length. n3 is unitless.

n1 = n2 = Input n3:

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