e) A bird of mass 0.50 kg hovers by beating its wings of effective area 0.30 m2 O What is the upward force of the air on the bird? (ii) What is the downward force of the bird on the air as it beats its wings? (iii) Estimate the velocity imparted to the air, which has a density of 1.3 kg m', by the beating of the wings. Which of Newton's laws is applied in each of (1), i) and (ii) above?

e) A bird of mass 0.50 kg hovers by beating its wings of effective area 0.30 m2 O What is the upward force of the air on the bird? (ii) What is the downward force of the bird on the air as it beats its wings? (iii) Estimate the velocity imparted to the air, which has a density of 1.3 kg m', by the beating of the wings. Which of Newton's laws is applied in each of (1), i) and (ii) above?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter4: Forces In One Dimension

Section: Chapter Questions

Problem 94A

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