hey:

I’m working on a orbital simulator with using physics. But i got some problems.

In free fall motion， mechanical energy E = Ep + Ek. and Ep=m*g*h ,Ek=m*v^2*1/2

The value E should be consistent until it hit ground. But…

The value getting smaller and smaller.

In general, it is not a big deal，but in orbit system any small deviation will make huge mistake.

I’m pretty sure that linear damping has be set to 0.

Could you Help me solve this problem ？

Thanks a lot