how would I change the gravity for one certain model?

I am trying to change the gravity for one model so when It falls from the sky, it falls slowly and doesn't just crash down. What I got so far is to put a script in each part of the model as well as a bodyforce. I have no idea how to do this, ideas?

Here is my script

script.Parent.BodyForce.Force = Vector3.new(0, game.Workspace.Gravity, 0) == script.Parent.GetMass()

###You would multiply Gravity and the part's mass, and the result would be what the Y axis should be. Your current script is attempting to assign Force to a boolean, which is bound to throw an error since the expected value is a Vector3.

script.Parent.BodyForce.Force = Vector3.new(
    0,
    game.Workspace.Gravity*script.Parent.GetMass(),
    0
)