| Homework solutions |
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| Question
7 (1 point) Newton concluded that some |
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| force
had to act on the moon because |
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| • | a.
the moon moved at a constant velocity. |
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| • | b.
a force is needed to pull the moon outward. |
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| • | c. a force is needed to pull the moon away from |
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| straight-line motion. |
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| • | d.
a force is needed to keep the moon in |
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| motion. |
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| • | e.
all of the above. |
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