An eagle with 18m wingspan flaps its wings 21 times per, Ask an Expert

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An eagle with 1.8m wingspan flaps its wings 21 times per minute, each stroke extending from 42%u2218above the horizontal to 42%u2218 below. Downward and upward strokes take the same time.

a. On a given downstroke, what's the average angular velocity of the wing?

b. What's the average tangential velocity of the wingtip?

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