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An airplane releases a ball as it flies parallel to the ground at a height of...

An airplane releases a ball as it flies parallel to the ground at a height of ℎ=285 m as shown in the figure. If the ball lands on the ground a horizontal distance equal to the height ℎ from the release point, calculate the speed ? of the plane. Neglect any effects due to air resistance, and use ?=9.81 m/s2 for the acceleration due to gravity.

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