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In the following figure A 5 m B a ladder with length 5 m leans against a wall. The point of contact A between the

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In the following figure A 5 m B a ladder with length 5 m leans against a wall. The point of contact A between the ladder and the wall slides down at a constant speed of 0.8 m/s. When A is 4.8 m above the ground, (a) find the sliding speed of B away from the wall (b) find the rate of change of 0 (in degree/s, correct to 2 decimal places)

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