And they say that lawyers speak in mumbo jumbo.

Sorry, you will have to do better than that to convince me that the physics behind an automobile collision in which an automobile strikes an empty trash can in the street are the same as an automobile collision in which an automobile strikes a tree. Seems like in the latter situation there is a much more significant, direct and immediate transfer of energy than in the former. In the latter all the energy is dissipated in the moment of the collision whereas in the former only a small portion of the energy is transferred.

Wrong the ballistics pendulum depicts an inelastic collision.

quote:

Your diagram displays an elastic collision - see the note at bottom right: http://i33.photobucket.com/alb...csPendulum.gif[Which reads: Energy (potential plus kinetic energy) IS conserved as the combined masses swing up AFTER the collisions. [Capital letters by me, in lieu of underlining, since I don't know how to underline.]]

JPK

If any of the energy is not conserved then it is an inelastic collision and there is no doubt that the only energy that is conserved is at the top of the arc, which means without a doubt that the diagram depicts an inelastic collision.

Craig Bodington wrote this.

"Water buffalo are considerably bigger; the largest African buffalo bulls rarely weigh more than 1,500 pounds, while a big water buffalo bull will weigh a ton. Both are incredibly strong. I’ve seen water buffalo taken easily with fairly light rifles but, once adrenaline is up, I’ve also seen them take multiple good hits from heavy calibers. Cape buffalo, of course, are notorious for being tough—but I don’t think there’s much difference there, except that the water buffalo, whether he’s as tough or not, is a whole lot bigger—and that does make a difference."



http://www.sportsafield.com/co...alo-vs-water-buffalo

quote:

Originally posted by jwp475:
If any of the energy is not conserved then it is an inelastic collision and there is no doubt that the only energy that is conserved is at the top of the arc, which means without a doubt that the diagram depicts an inelastic collision.

I'm in a tree seeking a MS sika deer right now so forgive excessive brevity and sp.

Your post represents a complete misunderstanding of the issue. Yes (nearly) all pre strike energy is stored at the top of the 2nd block's arch, but it is there before the block reaches the top of its arch, in fact it is retained throughh the entire event.

The diagram represents an elastic collision in so far as one can be represented in a simple diagram, and would be an entirely elastic collision absent air resistance etc.

Even the diagram's note informs that it depicts an elastic collision, stating all energy is preserved.

JPK

quote:

Originally posted by jwp475:
Craig Bodington wrote this.

"...the largest African buffalo bulls rarely weigh more than 1,500 pounds, ..."



http://www.sportsafield.com/co...alo-vs-water-buffalo

And they top at at 900kg, or 1984lbs, as Ungalates Unlimted informs.

JPK

quote:

Originally posted by JPK:

quote:

Originally posted by jwp475:
Craig Bodington wrote this.

"...the largest African buffalo bulls rarely weigh more than 1,500 pounds, ..."



http://www.sportsafield.com/co...alo-vs-water-buffalo

And they top at at 900kg, or 1984lbs, as Ungalates Unlimted informs.

JPK

Andre the giant wieghed 520 pounds definately not the norm, and as you know that is the point.

quote:

Originally posted by JPK:

quote:

Originally posted by jwp475:
If any of the energy is not conserved then it is an inelastic collision and there is no doubt that the only energy that is conserved is at the top of the arc, which means without a doubt that the diagram depicts an inelastic collision.

I'm in a tree seeking a MS sika deer right now so forgive excessive brevity and sp.

Your post represents a complete misunderstanding of the issue. Yes (nearly) all pre strike energy is stored at the top of the 2nd block's arch, but it is there before the block reaches the top of its arch, in fact it is retained throughh the entire event.

The diagram represents an elastic collision in so far as one can be represented in a simple diagram, and would be an entirely elastic collision absent air resistance etc.

Even the diagram's note informs that it depicts an elastic collision, stating all energy is preserved.

JPK

No the "pre strike energy is not stored at the top" that is a total misunderstanding. Kinetic energy is calculation and not measurable. Mass must be in motion to have kinetic energy. Elastic collisions have an energy transfer and total conservation of energy.

Last post until I really need to pay attention to the marsh...

That energy is calculated is irrelevant, it exist. A body in motion with momentum must have energy, so while... Heard a buggle must go...

Fwiw, I saw a stag but though he looked big in the body and mature I couldn't find antlers at 40yds or so with my Binos. My partner saw one last weekend broken off just above the hair line on both sides. Maybe the same one?

Anyway, I passed.

Amung energy sources there is potential energy, which is storable. The block at the apex of its arch is one example, as noted on your diagram of an elastic collision.

So an object in motion has energy, an object at rest may have potential energy. Momentum had a vector component, which requires motion.

Again, your diagram displays an elastic collision, or at least as close as we can lust rate on a single page.

JPK

That pendulum made of wood with the bullet penetrating the wood is a inelastic collision Why ? Because energy is converted and lost ! Heat energy and acoustic energy thus by definition it cannot be a elastic collision !

Wow, funny how these threads evolve and people get more and more pedantic as the discussion goes on.

Getting back to the OP, unfortunately I can't help as I don't use rat calibers like .375 on elephants.

I see you are into joules now, an thermal measurement. You use a lot of words to defend your postion that is incorrect and I am sure that you already know this.

Ballistics Pendulum


The collision of the ball with the catcher is inelastic, so kinetic energy is not conserved in the impact. Momentum is always conserved, so:

http://www.lhup.edu/~DSimanek/...labman1/ballist!.htm

You don't get it it is because you don't want to. Argue on I am done

quote:

Originally posted by ALF:
That pendulum made of wood with the bullet penetrating the wood is a inelastic collision Why ? Because energy is converted and lost ! Heat energy and acoustic energy thus by definition it cannot be a elastic collision !

Yes, and since the diagram shows an intact block and so no conversion of energy it displays an elastic collision.

JPK

quote:

Originally posted by JPK:

quote:

Originally posted by ALF:
That pendulum made of wood with the bullet penetrating the wood is a inelastic collision Why ? Because energy is converted and lost ! Heat energy and acoustic energy thus by definition it cannot be a elastic collision !

Yes, and since the diagram shows an intact block and so no conversion of energy it displays an elastic collision.

JPK

Seriously JPK, you have to be joking.

quote:

Originally posted by ALF:
That pendulum made of wood with the bullet penetrating the wood is a inelastic collision Why ? Because energy is converted and lost ! Heat energy and acoustic energy thus by definition it cannot be a elastic collision !

Exactly.

Also the two colliding bodies (bullet & block) are together after the collision.

quote:

Originally posted by jwp475:
Ballistics Pendulum


The collision of the ball with the catcher is inelastic, so kinetic energy is not conserved in the impact. Momentum is always conserved, so:

http://www.lhup.edu/~DSimanek/...labman1/ballist!.htm

You don't get it it is because you don't want to. Argue on I am done

I went back to your diagram and admit that I mistook it for a display of an elastic collision. I missed the block "capture" of the bullet and concluded, incorrectly, that the block was resilient material and the collision was similar to steel balls or pool balls. OOPs. My appologee.

In a blind now hoping to initiate an inelastic collision where energy is not conserved and is transformed into friction, heat and sound and used to deform a .257" 120gr NP.

JPK

Good luck hunting.

Had one bugle close again, maybe 75yds. But again didn't see him. LOng day, I'm beat.