Essential University Physics: Volume 1 (4th Edition)

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 10 - For Thought and Discussion - Page 191: 8

Answer

The location of the mass.

Work Step by Step

We know that mass leads to a greater moment of inertia, especially when it is far away from the axis of rotation. Through having less muscle lower on its leg, the horse reduces the amount of mass far from the axis of rotation. This characteristic makes it easier for the horse to move its leg and thus helps it run fast.
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