Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 6 - For Thought and Discussion: 9

Answer

Energy

Work Step by Step

Work is equal to a change in energy over a change in time. Thus, multiplying time onto the other side of the equation, we obtain: $$ E = W \Delta t$$ The units of work times the unit of times gives Watt seconds. This is equal to energy, so we see that Watt seconds is a unit of energy.
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