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placed on the tree branch, the branch suddenly breaks causing the ladder to fall. Due to the ice storm, the coefficient of friction, µs = µk ~ 0 and the bottom of the ladder can slide freely without any friction. Assume that the ladder has a total length of5 m, a mass of 10 kg, and just after the branch breaks, the angle between the ladder and the ground is 45°, as shown. (a) the angular acceleration of the ladder, a (b) the normal, or reaction, force at the base of the ladder in this case

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