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Physical Science
Pretest
Question 4
4
lesson pretest
Multiple Choice
Pretest
Question 4 • Physical Science
Which statement best describes why a machine is useful?
Answer
A
A machine can decrease both the input force and the input distance needed to do a given amount of work.
B
A machine does a greater amount of work than the amount of work that is done on it.
C
A machine can decrease either the input force or the input distance needed to do a given amount of work.
D
A machine does a smaller amount of work than the amount of work that is done on it.
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