Answer
Find the resultant of the perpendicular 100 km/h vectors by using the Pythagorean theorem.
$$(100 \frac{km}{h})^{2}+(100 \frac{km}{h})^{2} =v^{2}$$
$$v=141 \frac{km}{h} $$
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 5 - Plug and Chug - Page 86: 24
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