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Q & A: How do things roll down hill?

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Most recent answer: 10/22/2007
Q:
How do things roll down hill?
- raudel perez (age 24)
Chico, CA
A:
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.

MS

(published on 10/22/2007)

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