RE: oh well!(kaboom) - a boring excursion into physics ofKinematic Motion

[Brett Dikeman <brett@pdikeman.ne.mediaone.net>]

>One of the Conservation Laws states that Energy does not emerge or
>disappear but
>rather convert from Potential into Kinetic and back.

hmm.  What about inelastic collisions?  You forgot heat...part of an
inelastic collision's energy is converted into heat :)

>Therefore by using your formulae we would get height*mass = velocity*mass.
>If we
>minimise by mass we'll get: height = velocity or substituting the dimensions:
>m = m/s. That's wrong.
>
>BTW, height*mass = simply nonsence, dimensions don't agree (m*kg). Potential
>Energy in a simple case of a gravitational free fall is P = m*g*h or in
>dimensions it's (kg*m*m)/s^2. Since m/s is the dimension of velocity one
>can see
>that dimension-wise it correlates with the formula for the Kinetic Energy
>below.
>
>You also state that velocity*mass = Kinetic Energy. That is incorrect. In
>reality velocity*mass = Impulse, whereas Kinetic Energy = 1/2*mass*velocity
>square.
Both were simplifications and from (bad) memory; I left out g in the
potential energy, and simplified the KE equation by accident.  g is just a
constant, no big deal :)


>Where did the Work go? It produced that KABOOM! in the subject line. Got
>converted into heat and was spent on heating up the Universe.
Actually, did you know the universe is cooling down? :)
With a fine enough measurement, the astrophysicist types can figure out how
old the universe is by how hot/cold it is.  It's cooling down because of
the expansion.

Now we're trudging into meaning-of-life territory :)

Keep in mind my statements were based on taking physics 2 years ago, being
very tired, and it being about 2 in the morning(and I didn't care much :)

Brett

------
Brett Dikeman
brett@pdikeman.ne.mediaone.net
~)-|
Hostes alienigeni me abduxerunt.  Qui annus est?
Te audire non possum.  Musa sapientum fixa est in aure.
Ita, scio hunc 'sig file' veterem fieri.
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