Answer
c)
Work Step by Step
Work done in free fall can be either positive or negative. This is because the object can be only moved by gravity. And the object can be moved either upward (positive) or downward (negative).
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 5 - Work and Energy - Learning Path Questions and Exercises - Multiple Choice Questions - Page 172: 4
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