I have a stupid question for all the mathematicians on here. Everyone always says that torque is not work it's a force. Answer me this. If you ran out of HP on a slope and stalled out and stop you are now not making any hp correct? So now no work is being achieved because now you have torque applied to hold you from rolling backwards but no RPM are being achieved. Now reduce the applied torque just enough to allow you to roll backwards but still keep torque applied. Now you have RPMS, how do you measure how much hp it takes to hold a certain speed going backwards down the hill?