A hummingbird is able to hover because, as the wings move downward, they exert a downward force on the air. Newton's third law tells us that the air exerts an equal and opposite force (upward) on the wings. The average of this force must be equal to the weight of the bird when it hovers. If the wings move through a distance of 2.9 cm with each stroke, and the wings beat 85 times per second, determine the work performed by the wings on the air in 1 m if the mass of the hummingbird is 3.2 g.

A hummingbird is able to hover because, as the wings move downward, they exert a downward force on the air. Newton's third law tells us that the air exerts an equal and opposite force (upward) on the wings. The average of this force must be equal to the weight of the bird when it hovers. If the wings move through a distance of 2.9 cm with each stroke, and the wings beat 85 times per second, determine the work performed by the wings on the air in 1 m if the mass of the hummingbird is 3.2 g.

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College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A hummingbird is able to hover because, as the wings move downward, they exert a downward force on the air. Newton's third law tells us
that the air exerts an equal and opposite force (upward) on the wings. The average of this force must be equal to the weight of the bird when
it hovers. If the wings move through a distance of 2.9 cm with each stroke, and the wings beat 85 times per second, determine the work
performed by the wings on the air in 1 m if the mass of the hummingbird is 3.2 g.

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