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Old Aug 14th 2017, 07:03 AM   #1
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Gravitational potential energy

hi, everyone, i have no idea with question number 10, anyone have idea about this?

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Old Aug 14th 2017, 07:30 AM   #2
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Originally Posted by goldsomecriss View Post
hi, everyone, i have no idea with question number 10, anyone have idea about this?

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Forum policy states that we can't help you until you've taken a shot at answering it. However it seems clear that you don't know where to start so I can get you started.

State what you've learned about gravitational energy and see if that gets you going in the right direction.
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Old Aug 14th 2017, 07:36 AM   #3
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Thanks,As i know, gravitational potential energy use the formula of (-GMm/R)...this is the only one i know, but still have no idea for further calculation...

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Old Aug 14th 2017, 08:00 AM   #4
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I had great trouble with your last thread because (I think) the picture you posted was too large.

Can you rejig it so that I can see more than one corner of it please?

We don't get this problem with other posts so is it something to do with tapletalk or whatever?
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Old Aug 14th 2017, 09:02 AM   #5
Pmb
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Originally Posted by goldsomecriss View Post
Thanks,As i know, gravitational potential energy use the formula of (-GMm/R)...this is the only one i know, but still have no idea for further calculation...

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What kind of course is this? Is it summer school or something? Didn't your text or professor give you an examples of using that formula? I ask these questions, not because I'm stingy or lazy with my help, but because I know from many years of experience that the best way to understand a concept is to force yourself to solve problems, whether they are easy or whether they're hard. I'll give you a little hint to get going.

Hint: Potential energies add up. That means that if you want to find the total potential energy of a system then you add the contributions from each source. Does that help any?

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Old Aug 14th 2017, 11:02 AM   #6
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Do you know how to determine the gravitational PE at points A and B if there was only one mass M? For two masses you simply add the PE due to each individual mass.
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