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 - Problems: 61a

Answer

126km/s

Work Step by Step

The star rotates once every second. If a particle is on the equator, we need to find the distance that it would cover in one revolution (the circumference of the star). This is 2*pi*r where the radius is 20km = 125.6km. Therefore, the speed of the particle is 125.6km in one second or 126km/s
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