"Joe Fischer" <gravity1@shell1.iglou.com> wrote in message
news:3beb0281_2@news.iglou.com...
> AndroclesInFlorida <mariebarbe@home.com> wrote:
> : "Merritt E Adams" wrote:
> :> Why when a 2m (m=mass) ball hits a series of balls all with a mass of m,
> :> do we not get 2 balls of mass m coming out with the same initial
> :> velocity?
> :
> : Momentum is conserved.
> : Momentum is mass multiplied by velocity. So you CAN get two balls with the
> : velocity of the 2m ball (which stops) OR you can get one ball with twice the
> : velocity of the 2m ball, or you can have 4 balls with half its velocity.
>
>         What a wonderful way to teach physics, :-),
> put on a clown suit and forget about kinetic energy,
> then demonstrate with billiard balls how wrong you are. :-)
>
>         Please don't ask to drive one of my cars though,
> to get my permission you have to know how compute stopping
> distance in your head.

Obviously you've never actually played pool or billiards,
or seen Newton's cradle in action :)
KE is simply the integral of the momentum. It isn't forgotten, just
unnecessary to answer the question.