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10-11-2022
Mathematics

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A 5 m long plank is leaning against a vertical wall at an angle 0 with the horizontal surface, as shown below. The bottom of the plank is 1 m from the wall. If the bottom of the plank is pulled horizontally away from the wall at a constant rate of 0.5 m/s, at what rate will 0 decrease after 4 s?

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