Which BEST describes simple machines?
a.
They are mechanical devices for doing work.
b.
They are mechanical devices that double the output force.
c.
They are mechanical devices that make work easier by changing the direction of the force.
d.
They are mechanical devices that help humans to complete tasks easily and fast
Answers & Comments
Answer:
D. They are mechanical devices that help humans to complete tasks easily and fast.
Explanation:
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