Hakeem throws an 8.00 g ball straight down from a height of, Ask an Expert

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Q. Hakeem throws an 8.00 g ball straight down from a height of 2.0 m. The ball strikes the floor at a speed of 7.40 m/s. What was the initial speed of the ball? Assume that air resistance is negligible.

Q. An airplane has a mass of 2.4e6 kg, and the air flows past the lower surface of the wings at 85 m/s. If the wings have a surface area of 1200m2, how fast must the air flow over an upper surface of the wing if the plane is to stay in the air? Consider only Bernoulli Effect.

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