Answer
Positive
Work Step by Step
Work is positive when the force acts in the direction of displacement. Since each puck move in the direction of force the work is positive. However, the net force of the system is zero since they cancel out.
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0133942651
ISBN 13:
978-0-13394-265-1
Chapter 9 - Work and Kinetic Energy - Stop to Think 9.3 - Page 213: 1
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