Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 4 - Motion in Two and Three Dimensions - Questions - Page 82: 4a

Answer

All the vectors have the same initial launch speed.

Work Step by Step

Since speed is a scalar quantity, we are only concerned with the magnitude of the vectors, not the direction. Each of the vectors have one 20 component and one 70 component. Since we aren't concerned with the discretion, the sign of the values do not matter.
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