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Compute the speed of the rocket

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Q: A test rocket is fired vertically from a launching pad at B. When the rocket is at P the angle of elevation ion is θ =47.0°, and 0.5 s later it is θ= 48.0° . Knowing that b = 4 km, determine approximately the speed of the rocket during the 0.5-s interval.

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Mechanical Engineering: Compute the speed of the rocket

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