The mass of a planet causes the pull of gravity on that planet.
Weight is the measurment of the force of gravity on a mass.
The force of gravity pulling on an object determines the weight.
What determines the weight of an object?
* Force of gravity pulling it
* Inches or fractions of inches.
* Burning fuel and air
* a hemisphere is tilted away from the sun
* a hydraulic system
* kinetic energy
* a tree falling
* principals of aerodynamics