Question

An eagle with 1.8 m wingspan flaps its wings 18 times per minute, each stroke extending from 49 ∘above the horizontal to 49 ∘ below. Downward and upward strokes take the same time.

Problem 10.43 Part A On a given downstroke, what's the average angular velocity of the wing? Express your answer to two significant figures and include the appropriate units An eagle with 1.8 m wingspan flaps its wings 18 times per minute, each stroke extending from 49 above the horizontal to 49 °below. Downward and upward strokes take the same time Value Units atue Submit My Answers Give Up Incorrect; Try Again; 3 attempts remaining Part B What's the average tangential velocity of the wingtip? Express your answer to two significant figures and include the appropriate units alue Units Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining

Answer 1

The Engle wings oscillate at 18 times per minute. Hence the frequency of eagle wings is equal to zero 20times 20 1min60 0.33Hz The final angular velocity of oscillation is, IT = 2π (0.33) - 2.07rad/s The Angular velocity of the wings is, 2 0+2.07 2 1.0 rad/s b) The radius of the wing is, 2 1.8 2 = 0.9 m The average tangential velocity is, (0.9) (1.035) 0.93 m/s