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4. A ladder rests against a smooth wall. There is no friction between the wall and the ladder, but there is a frictional force between

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4. A ladder rests against a smooth wall. There is no friction between the wall and the ladder, but there is a frictional force between the floor and the ladder. What is the minimum angle 0 required between the ground and the ladder so that the ladder does not slip and fall to the ground? (5 marks) No friction 980 Ladder m =10kg L = 3m 245N 25 kg With friction u = 0,6 Ne

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