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A uniform ladder is 10 m long and weighs 240 N. In the figure below, 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 a distance 3.0 m from its base (measured along the ladder). (a) If F = 50 N, what is the force of the ground on the ladder, in unit-vector notation? Fground = N (b) If F = 150 N, what is the force of the ground on the ladder, in unit-vector notation? Fground = N (c) Suppose the coefficient of static friction between the ladder and the ground is 0.38; for what minimum value of F will the base of the ladder just start to move toward the wall? Fmin = N Did you write A balance-of-torques equation using the floor-ladder contact point about which to calculate torques? Did you then write A balance-of-forces equation for horizontal force components? For vertical force components? Do you recall that when an object is on the verge of sliding, the frictional force is at its maximum value? Do you recall how to relate that value to the normal force?

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