In reference to the issue you are explaining, as best I can interpret, I would
suggest using a physics book, specifically the REA solution series. They should have
a "free body diagram" for you to use.
To move a body at rest, on the ground, you have to overcome static momentum, and
once you have it moving, you use kinetic momentum, as best I can remember at this time.
I think the quick answer you are looking for is in the tutorials, in this forum. Good Luck!!