Wrong; you are correct that it is the cross product; but r and v are not always perpendicular.Originally posted by StephenPrivitera
Sorry, found the problem. |r x v|=RVsinA and since r and v are always perpendicular.
Correct,Stephen, the orbit would be circular IF and only if v were always perpendicular to r; but it is not.edit:
"since r and v are always perpendicular"
but wouldn't that only work for circular orbits?