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November 01, 2025, 09:51:49 am
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Author Topic: Interesting Circular Motion Question  (Read 1137 times)  Share 

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JackSonSmith

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Interesting Circular Motion Question
« on: February 23, 2015, 08:18:40 pm »
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1) Does kinetic energy change when an object moves in uniform circular motion? ie. if the magnitude of velocity does not change than KE would not change, however I'm not sure.

2) Please find attached a related question.
« Last Edit: February 23, 2015, 08:20:58 pm by JackSonSmith »
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Kel9901

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Re: Interesting Circular Motion Question
« Reply #1 on: February 23, 2015, 10:56:07 pm »
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Quote from: JackSonSmith on February 23, 2015, 08:18:40 pm
1) Does kinetic energy change when an object moves in uniform circular motion? ie. if the magnitude of velocity does not change than KE would not change, however I'm not sure.

2) Please find attached a related question.

1) yeah you're right, KE is constant when (magnitude of) v is constant
2) KE remains constant, but as the velocity (direction) changes during the rotation, so does the momentum, which is just mass (scalar) times velocity. C would be the answer
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