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  3. a construction worker pulls a five meter plank up

A construction worker pulls a five meter plank up the side of a building under...

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Calculus

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A construction worker pulls a five meter plank up the side of a building under construction by means of a rope tied to one end of the plank see figure Assume the opposite end of the plank follows a path perpendicular to the wall of the buildin and the worker pulls the rope at a rate of 0 12 meter per second How fast is the end of the plank sliding along the groun when it is 1 9 meters from the wall of the building Round your answer to two decimal places m sec 5 m

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