Today Health Direction

Which is faster?
If you have two tires, a steel one which is heavier and a rubber one which is lighter and both are rolled down a hill, which one would reach the bottom first? Assuming air resistance is negligible, and traction is the same (both have same amount of friction).


steel, the rubber one would cause more friction
bitch


my bad, forgot to include "sliding" friction as negligible


the steel tire would have more momentum rolling down hill


the steel tire would have more momentum rolling down hill it could have more momentum...but momentum is just mass * veolcity, you can have more momentum and not necessarily be moving faster


assuming the steel is solid like on a train, while the rubber is just a tire with a hollow center, the rubber one would roll down faster as it has more mass ont he outside=more momentum.


you want moment of inertia. this pdf might help:
http://rockpile.phys.virginia.edu/arch16.pdf
i think it works out a similar problem


The heaver one would be moving faster
http://www.videosift.com/video/Rolli...mp-Competition
look at the speeds upon launch (although they don't travel as far)


same time FTW


if the steel is a solid disc and the rubber one is more of a hoop (hollow center) the steel arrives first.