Is Newton's first law of motion applicable when walking?

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Einstein60
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Is Newton's first law of motion applicable when walking?
 
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It's always applicable. But walking is a complicated process of using forces to drive yourself along and support yourself, so a naive application of it (something like "walking at constant speed shouldn't tire me out at all") won't work.
 
Einstein60 said:
Is Newton's first law of motion applicable when walking?
If we assume that Newton's first law only applies to a body with no unbalnaced external forces, then the answer is no, it does not apply to a person walking.
 
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