Date: Tue, 7 Feb 2012 12:49:55 -

Author: --- Paul Doherty

Subject: Re: Electrostatics in Space

Post:

Doing some calculations on the electrostatics force law from a linear charge source.

The force falls off proportional to 1/r the centripetal force in a circular orbit of radius r is proportional to v^2/r set these equal and find the orbital velocity v is constant independent of radius.

The orbital period is T = 2pir/v so T is proportional to r.

I'll have to look at frame by frame analysis and see how well this hold up.

Paul D



On Feb 7, 2012, at 10:33 AM, Jerry DiMarco wrote:

> Perhaps a Millikan oil drop apparatus could be adapted to do this...
>
> Jerry D
>
>
> At 2/7/2012 01:22 PM, you wrote:
>> ......
>> Though I'd love to do it in class...perhaps in a falling elevator?
>>
>> Dave/RU
>>
>>> On 2/7/2012 11:35 AM, David Maiullo wrote:
>>>> Hi Tappers,
>>>>
>>>> I thought this was pretty neat:
>>>>
>>>> http://www.nasa.gov/multimedia/videogallery/index.html?collection_id=81141
>>>>
>>>> Enjoy,
>>>> Dave/RU
>
>




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