Originally Posted By: paul
now that all depends if you can move a distance * 3m/s

No it doesn't. We can multiply any two quantities. It doesn't matter if the result represents some distance moved or energy consumed, or something else we don't even have a name for, but is still useful, like a speed squared.


Quote:

if we could work and earn
$100 day * 7 days = 700 dollars^2 (seven hundred dollars squared)

You actually don't know why the units get squared do you? There's no dollars^2 there because you're not saying dollars should be multiplied by itself. It's should be:

$100/day * 7 days
= $700 days/day
= $700

The simple concept is that units can be operated on the same as numbers. That's all Paul. Your way involves guessing the units because you have no consistent way to decide.