Hi,

>No, momentum is mass * velocity: the reason why a fist hitting a face does more damage to the face than vice versa - the fist, even though lighter than the face, because of its speed has a great momentum. The stationary face, although heavier than the fist, has no momentum.

Huh? So if the fist was stationary and the head hit the fist at the same speed then the fist would suffer the most damage <g>