Letting a child roll down a hill in any tire is not the safest way to let them play. The child could always fall out before coming to a stop, resulting in the possibility of the tire rolling over the top of them.
A pancake can roll down a hill. The possibility of it is unlikely but it is possible.
Because you roll them down a hill
when you roll down a hill in your dance routine
you just push it.
push it down a hill
puh it down a hill
When you roll on the ground, as in "tumble down the hill."
coast
No, It is kinetic energy
sisyphus
they do that so it does not roll down hill
mountain lions??? Cascade Mountains???