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November 08, 2025, 03:57:34 am
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Author Topic: Inelastic Collision  (Read 635 times)  Share 

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jono88

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Inelastic Collision
« on: March 13, 2013, 06:35:17 pm »
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Does it only involve the Eki (kinetic energy initial)  being greater than Ekf (kinetic energy final)?
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availn

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Re: Inelastic Collision
« Reply #1 on: March 13, 2013, 06:37:11 pm »
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Pretty much yes. In elastic collisions, KE before = KE after. In inelastic collision, some energy is lost, so KE before > KE after.

Keep in mind that energy is ALWAYS conserved. The extra energy from before is turned into heat or sound.
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jono88

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Re: Inelastic Collision
« Reply #2 on: March 13, 2013, 06:38:56 pm »
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Reason im asking is because I had a Ke initial of ~6J and than a final Ke of ~0.8J O.O
situation is a guy that jumps on a moving skateboard.
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availn

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Re: Inelastic Collision
« Reply #3 on: March 13, 2013, 06:55:27 pm »
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Quote from: jono88 on March 13, 2013, 06:38:56 pm
Reason im asking is because I had a Ke initial of ~6J and than a final Ke of ~0.8J O.O
situation is a guy that jumps on a moving skateboard.

Did you add the masses of the guy and the skateboard together? BTW, this is a perfectly inelastic collision, where a maximum amount of kinetic energy is lost. This happens when two bodies bond perfectly and move as one at the same velocity after the collision.
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jono88

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Re: Inelastic Collision
« Reply #4 on: March 13, 2013, 07:07:22 pm »
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Sweet your explanation matches my calculations. And yes i added the guy and skateboard together. :) Thanks!
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