Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
"Carl E. Mungan" wrote:
Free-body diagram. The net force on the block is -umg. This equals
ma. Thus a = -ug which is a constant. Thus we can use the equation of
kinematics, v^2 = v0^2 + 2ax. But v = 0.
I recognize that as an equation from point-particle
kinematics. If you claim it applies to objects with
nontrivial internal structure, please provide a
derivation or a pointer to a derivation.
Hint: I've got a pocketful of counterexamples, so
any such derivation is going to be quite a rare bird.
We insist there is a logically sound theorem
applicable to the block as a whole.
I'm from Missouri. Show me.
We can agree there is a problem
of what to *name* various items.
I am not interested in quibbling about names.
I haven't raised the naming issue.
I agree we shouldn't go there now.
That's fine and I have no problems with your personal preferences.
"De gustibus non disputatum."
Since when is the definition of kinetic energy a
matter of personal preference? The attempted
calculation in the previous note miscalculated
the kinetic energy by roughly a factor of two.
I don't see how a logically sound theorem could
produce such a result.