Fundamentals of Physics Extended (10th Edition)

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

Chapter 2 - Motion Along a Straight Line - Problems - Page 33: 13c

Answer

70.5 mph

Work Step by Step

We found that the average speeds of the trip were 73km/h and 68km/h (average speed for each direction of the trip). The average of the whole trip is just the average of the two speeds.---73+68=141 141$\div$2= 70.5
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