Uni Stuff > Physics
angular momentum
/0:
Even though there is no friction between the tyres and the ground, the tyres would still be move when you pedal them.
Also, I don't think you even need linear momentum. You can be completely stationary, but as long as the tyres have angular momentum you won't fall down.
I guess the lack of friction would make it easier to fall down, but I'm not sure about that, since you would still need to conserve angular momentum somehow.
appianway:
Yeah I know there'd be conservation of angular momentum for the balance, but what I was saying was that you don't need the wheels to turn to move (if there's linear momentum it'll continue in its path).
kamil9876:
I would rule out linear momentum having anything to do with this, simply because you can change to a reference frame where it would be stationary; but both reference frames must agree on whether it falls down or not. To check whether a certain phenomena depends on some variable, it is good to see if it also works in other reference frames.
I remember some demos long way back where the lecturer chucked a rotating wheel in a suitcase, and suddenly it became uber hard to move it sideways, so angular momentum does ring a bell(also, all inertial reference frames agree on angular momentum so it seems like a better candidate)... but meh i won't have to do any more physics after sem1 next year 8-)
TrueTears:
--- Quote from: kamil9876 on December 24, 2009, 10:43:00 pm --- but meh i won't have to do any more physics after sem1 next year 8-)
--- End quote ---
hahah I assume all maths?
maths >>>>>> all science
/0:
--- Quote from: TrueTears on December 24, 2009, 10:46:34 pm ---maths >>>>>> all science
--- End quote ---
lies
>:(
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