Learn more physics!
How do things roll down hill?
- raudel perez (age 24)
Gravity tries to pull things to the center of the earth. The ground,
however, usually gets in the way (good thing too). If the ground is
sloped, like on the sides of a hill, the object being pulled at by
gravity (a ball for example) can get closer to the center of the earth
by rolling to the bottom of the hill.
(republished on 07/12/06)
Follow-up on this answer.