Gravity isn't a force; it's the bending of space and time. Picture space and time like a big blanket. If you stretch the blanket out and hold it above the ground and then place a
http://www.ehow.com/about_5072367_surfacegravity...

Mass of Mars: [1] Volumetric Mean Radius of Mars: [1] Using the formula. [2] Where. is the universal gravitational constant. Plugging the values of. and. we get the value of. [1]
http://www.quora.com/Gravity/Whatistheaccelerat...

Approximately one third of the earths.
http://wiki.answers.com/Q/What_is_Mars_gravity_at_...

 The force that. exactly. balances the force of gravity, so that you can remain. vertically motionless and not accelerate up or down, is the upward force of the. ground or the floor
http://wiki.answers.com/Q/What_is_balancing_force_...
