[Phoenix-D]

F =ma
or in the case
a = F/m

In other words, if you want the same accleration with double the mass, you have to double the force.

EDIT: don't confuse weight and mass, BTW. Mass doesn't change. Weight DOES. Mass is how much matter an object has, weight is the acceleration produced by gravity on that object. It's just than on earth mass = weight, since we're at 1 G by definition.

[ February 09, 2004, 03:15: Message edited by: Phoenix-D ]