On Thu, 20 Feb 2014 14:40:05 -0600, Leon lcb11211@swbelldotnet
wrote:

On 2/20/2014 2:23 PM, wrote:
*Should be "of equal mass and close mass distribution"

And please don't swap the terms. Recoil? Leon likes the term bounce back

Bounce back = Energy that is not entirely absorbed by the strike and
which is deflected.

Right. Energy that isn't absorbed is useless, however that which isn't
moving the struck object is just being absorbed uselessly as heat
anyway. I don't see that the lack of "bounce" necessarily makes the
hammer more "efficient". It just means it's absorbing energy, rather
than the user's arm.

Recoil is a good term. Not all of the energy spent inside a bullet is
pushing the bullet down the barrel, much is absorbed by the person
shooting the gun.

Newton's third law kinda makes this a given.