Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 3 - Reading Check Questions (Comprehension): 24

Answer

The speed over the ground is 141 km/h.

Work Step by Step

This is discussed on page 51. See Figure 3.12, and use the Pythagorean Theorem to find the length of the resultant vector. $$(100 \,km/h)^{2}+(100 \,km/h)^{2}=x^{2}$$ $$x = 141 \,km/h$$ As a side note, the plane moves at an angle of 45° from its original direction, due to the stiff crosswind.
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