NTNUJAVA Virtual Physics LaboratoryEnjoy the fun of physics with simulations! Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
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Wisdom consists of the anticipation of consequences. ..."Norman Cousins(1913-1990, American author)"

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 Author Topic: ElasticCollision  (Read 6512 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
ahmedelshfie
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 « Embed this message 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

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Embed a running copy link(show simulation in a popuped window)
Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
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Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
 image.png (17.1 KB, 741x573 - viewed 625 times.) « Last Edit: September 20, 2011, 01:44:57 am by ahmedelshfie » Logged
ahmedelshfie
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 « Embed this message 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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 « Embed this message Reply #2 on: May 04, 2010, 02:37:43 am » posted from:,,Brazil

 Elastischer_stoß3.gif (64.56 KB, 500x63 - viewed 479 times.)  Elastischer_stoß3.gif (64.56 KB, 500x63 - viewed 446 times.)  Elastischer_stoß21.gif (94.46 KB, 500x120 - viewed 431 times.)  Elastischer_stoß.gif (53.58 KB, 500x60 - viewed 472 times.)  Elastischer_stoß_2D.gif (208.6 KB, 500x200 - viewed 445 times.)  Translational_motion.gif (398 KB, 300x263 - viewed 465 times.) Logged
ahmedelshfie
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 « Embed this message 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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 « Embed this message 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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 « Embed this message 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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Wisdom consists of the anticipation of consequences. ..."Norman Cousins(1913-1990, American author)"