A uniform ladder is 10 m long and weighs 200 N. In Fig.
Chapter , Problem 73(choose chapter or problem)
A uniform ladder is 10 m long and weighs 200 N. In Fig. 12-78, the ladder leans against a vertical, frictionless wall at height h ! 8.0 m above the ground. A horizontal force is applied to the ladder at distance d ! 2.0 m from its base (measured along the ladder). (a) If force magnitude F ! 50 N, what is the force of the ground on the ladder, in unit-vector notation? (b) If F ! 150 N, what is the force of the ground on the ladder, also in unit-vector notation? (c) Suppose the coefficient of static friction between the ladder and the ground is 0.38; for what minimum value of the force magnitude F will the base of the ladder just barely start to move toward the wall?
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