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Re: [Phys-l] the first law of motion



This is what I meant/implied. Air will eventually slow the car down...

Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu> writes:
JD:
b) If you talk about some "force to keep the car moving"
that is not OK. That's not physics. We cannot even begin
to quantify that.
I feel like there was a tacit assumption there that we need a force to
keep the car moving _because we know that there's a resistive force
present_. That's fine.

jg

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