>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>

Depends on whose head is used.