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"Nothing in life is to be feared, it is only to be understood." ..."Marie Curie 1867-1934, Polish born French Physicist, Twice Nobel Prize Winner- Physics and Chemistry)"
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Author Topic: ElasticCollision  (Read 6268 times)
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ahmedelshfie
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on: April 08, 2010, 07:40:53 pm » posted from:,,Brazil

This applet written by Fu-Kwun Hwang and Wolfgang Christian
Edited by Robert Mohr
Modified by myself
Original project : http://www.compadre.org/osp/items/detail.cfm?ID=8373

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* image.png (17.1 KB, 741x573 - viewed 590 times.)
« Last Edit: September 20, 2011, 01:44:57 am by ahmedelshfie » Logged
ahmedelshfie
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Reply #1 on: May 04, 2010, 02:35:32 am » posted from:,,Brazil

An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies after the encounter is equal to their total kinetic energy before the encounter. Elastic collisions occur only if there is no net conversion of kinetic energy into other forms. This definition applies to close encounters between a spacecraft and a gravitating body ( see gravity assist) as well as to actual collisions between individual atoms etc.

During the collision of small objects, kinetic energy is first converted to potential energy associated with a repulsive force between the particles (when the particles move against this force, i.e. the angle between the force and the relative velocity is obtuse), then this potential energy is converted back to kinetic energy (when the particles move with this force, i.e. the angle between the force and the relative velocity is acute).

The collisions of atoms are elastic collisions (Rutherford backscattering is one example).

The molecules—as distinct from atoms—of a gas or liquid rarely experience perfectly elastic collisions because kinetic energy is exchanged between the molecules’ translational motion and their internal degrees of freedom with each collision. At any one instant, half the collisions are, to a varying extent, inelastic collisions (the pair possesses less kinetic energy in their translational motions after the collision than before), and half could be described as “super-elastic” (possessing more kinetic energy after the collision than before). Averaged across the entire sample, molecular collisions can be regarded as essentially elastic as long as black-body photons are not permitted to carry away energy from the system.

In the case of macroscopic bodies, elastic collisions (except for near encounters with a gravtating body) are an ideal never fully realized, but approximated by the interactions of objects such as billiard balls.

When considering energies, possible rotational energy before and/or after a collision may also play a role.
Data from  http://en.wikipedia.org/wiki/Elastic_collision
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ahmedelshfie
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Reply #2 on: May 04, 2010, 02:37:43 am » posted from:,,Brazil

Images from  http://en.wikipedia.org/wiki/Elastic_collision


* Elastischer_stoß3.gif (64.56 KB, 500x63 - viewed 445 times.)

* Elastischer_stoß3.gif (64.56 KB, 500x63 - viewed 417 times.)

* Elastischer_stoß21.gif (94.46 KB, 500x120 - viewed 399 times.)

* Elastischer_stoß.gif (53.58 KB, 500x60 - viewed 442 times.)

* Elastischer_stoß_2D.gif (208.6 KB, 500x200 - viewed 412 times.)

* Translational_motion.gif (398 KB, 300x263 - viewed 435 times.)
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ahmedelshfie
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Reply #3 on: September 20, 2011, 01:47:41 am » posted from:-,-,BRAZIL

 I did some Modified at layout be different and clear mode enjoy !
« Last Edit: September 20, 2011, 01:55:25 am by ahmedelshfie » Logged
Fu-Kwun Hwang
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Reply #4 on: September 20, 2011, 05:14:24 pm » posted from:Idrija,Bohinj,Slovenia

There seems to be a problem, I was not able to load the applet.
You might need to upload the jar file again!
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ahmedelshfie
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Reply #5 on: September 20, 2011, 06:08:46 pm » posted from:SAO PAULO,SAO PAULO,BRAZIL

Well, i test is work fine at my browser(firefox last version) and internet explorar  may you need to test with other browser.
I post a video show that applet work fine.
thx








« Last Edit: September 20, 2011, 06:13:10 pm by ahmedelshfie » Logged
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"Nothing in life is to be feared, it is only to be understood." ..."Marie Curie 1867-1934, Polish born French Physicist, Twice Nobel Prize Winner- Physics and Chemistry)"
 
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