I know a place where things seem to roll uphill.  How does it work?
823621
assuming the object is not self powered or already in motion from somebody's pushing or wind power - then it is an optical illussion
115763
Gravity states that if you drop 2 things at the same time, regardless of weight they would hit at the same time. Yet a larger mass rolling down a hill will gain more speed. Just watch the difference in speed from the skeleton & bobsled teams.
505538
A mag-levs route is lined with magnets and they use the polarity to move -- almost like a model or toy train; except this is done with magnets. They don't come in contact with anything though they do have retractable rubber wheels but those aren't used when they are moving.\n\nEDIT: P.S. Aproov -- anyone can copy and paste...\n\nThere's more info in the below link:
100489
depends on where the hills are
927274
Yes - roll a ball down a hill. It has linear inertia (the balls center of mass moving down the hill) and rotational inertia (the ball is spinning while it moves down the hill).
807129
It is a little higher than normal.
514578
Yes, Gravity works everywhere, but there are some kinds of gas that result lighter than gravity so they float or even goes up.
1176303
If the grade is relatively steep, you're more likely to fall forward going uphill and backward going downhill. Your body will subconsciously try to get you to the ground the quickest way possible.
132369
Up-down (or down-up) direction. The perpendicular of the horizontal. :)
865713
No that is not true, it is true however that the "ROLL CENTER" can be under the ground on some vehicle designs.
818232
It is very easy when you are doing a steady uphill climb on a mountain that seems to be covered with oil. However, God always throws me a rope to pull me back up so I do not fall to far or too fast.
663898
well maybe for some reason your going down a driveway or somewhere where it might pick up speed on its own like a steep hill or anywhere steep and u cant stop it ur gonna need those brakes to help u out or maybe the are there so when the old people wanna race they can hold on to there brakes and peel out lol
527569
plateaus are elevated above the ground
264879
find a big hill put it in nuetral and hang on
462383
up and down are directions from a gravitional center.  So, one would be digging down from anywhere on the earth's surface until he got to the earth's gravitational center...then he'd be digging up.
112721
A grassy, gently sloping hill ending up with level ground at the bottom
702512
I used to run one, you pull the handle back and it goes up; push it forward it goes down.