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How long will it take to reach the ground

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Reference no: EM131861221

If a steel ball is tossed from the top of the Berj Khalifa in Dubai, the tallest building in the world, its height above the ground t seconds after it is dropped will be s(t) = 2717 - 16t2 feet (neglecting air resistance).

A. How long will it take to reach the ground? [Hint: Find when the height equals zero.] (Round your answer to two decimal places.)

B. Use your answer to part (a) to find the velocity with which it will strike the ground. (This is called the impact velocity. Round your answer to two decimal places.)

Reference no: EM131861221

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