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lesson pretestMultiple Choice

Pretest

Question 1 • Physical Science

Julian stands on his toes to lift his body high enough to reach a book. In this example, what do Julian’s toes function as?

Answer
A
a pulley
B
a fulcrum
C
a load
D
a wedge

Explanation

When Julian rises onto his toes, his foot acts as a lever: his toes are the pivot point, or fulcrum. His calf muscles provide the effort to lift his body, which is the load. So his toes function as a fulcrum.

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