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Old 01-25-2006, 04:45 PM  
just a punk
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Also depends on the rock's material. If you know it, you know:
1) it's strength (an ability to resist pressure)
2) it's density

the planet's gravitation depends on its size (diameter) and the rock's material (if that hypothetical planet is homogeneous). so you may see the point when the force of planet's gravitaion F (m*g) is greater than rock's strength.

where: m is a mass of the planet (depends on rock's density and planet's size (volume)) and g is a gravitational acceleration constant.
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