I change value of satellite image to draggable and add at variables page v=R*w also i attach two image for what i add to you can watch.
but the part that is [quote]For example: you can keep angular momentum is the same i.e. L=r*m*v=m*r^2*\omega to be a constant.[/quote] I didn't know where i can add this value.
other thing after i change satellite image to draggable, when i drag the satellite to change postion happend like zoom to the applet, (but this not happend all times).

thanks,