Object mass & rotation constraints

Hi,

im currently playing around a bit with the blender game engine by developing a little game. I got two problems right now.

You can set the mass of a rigid body object to a maximum of 10000. I have a small ball in my world ball that is still acting far too airy even with this maximum setting. How can I give it more weight?

I also want to restrict the rotation (caused by a key press) of an object to a certain degree. How can I do this?

Thanks in advance.

Check the sizes of things. A blender unit is a meter. Bear in mind it takes an object half a second to fall that far. I just had far to longer discussion with another forum member about scale in BA. I suspect we both came closer to being banned for a bit than preferable (it turned into an argument). So you can read the discussion over here.
You can also change the elasticity of collisions in the material physics settings to get collisions to ‘feel’ right.

And you’ll need to give some more information about ‘restricting the rotation’ before we understand what you are asking.

To make it simple I have an object like a simple plane which can be rotated by up/down arrow keys around a specific axis. At the moment I can make full 360° rotations which is not what i want because I dont know how to tell blender to stop it. I want to restrict that to like 45°.