Originally Posted By: dearmer
....Which one will hurt more? I hope most will agree (otherwise my example sucks) that the first despite being less energy will move the car further and hurt less....

Ah, but there in lies the rub, on the arm that is. Does the arm move the car less because some of the energy was expended to create the hurt, not movement?

Just kidding. Hey dearmer, thanks for taking so much of your time to lay your explanation.