When i use mouse middle button, pick the sphereObject, let's it roll on the ground, and i want sphereObject's Y not to work, how to do this? edit pick event ? or sphereObject's move event?
You'd better break down what you're doing a bit more. Are you controlling the sphere's movement, or is it rolling down some terrain? How are you moving the sphere?
SetMass will make it heavier in relation to other objects. It sounds like what you want to do is add a combination of world forces and angular torque.
1. Set up a physics controller object. You must perform Body.AddWorldForce() and Body.AddWorldTorque() from the controller's update loop, nowhere else.
2. Add your forces.
You should also adjust your material to suit a bowling ball: hard, low friction, not bouncy.