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Old May 30th 2013, 06:40 PM   #1
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Roller Coaster Energy



Hi, I am calculating energy (if there were to be no energy lost due to friction, etc) for this roller coaster.

I understand that at point A there is only GPE and that at point E there is only KE.
I was wondering if there would be both KE and GPE at point B and C.
Would there be both KE and GPE at point D as well?

Thanks!
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Old May 31st 2013, 06:50 AM   #2
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Originally Posted by njuice8 View Post
I was wondering if there would be both KE and GPE at point B and C.
Would there be both KE and GPE at point D as well?
Yes - assuming no friction, energy principles say that the sum of KE and PE is constant throughput the ride. So as the roller coaster descends it loses some PE and gains an equivalent amount of KE. Hence at intermediate points B, C and D it has some PE and some KE.
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