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- #2

Drakkith

Staff Emeritus

Science Advisor

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1/b - 1/a where they are ( respectively ) 1500000000 & 6378100 . The answer I get comes to : 1.5678650e-7 - Which I think is wrong.

I'm trying to calculate the average force on an O2 molecule 1,500,000,000 meters out from Earth - coming to ground. It SHOULD also be calculated as from infinity as well. Then I think it should cross check (when its arrival speed is calculated ) with the escape velocity for Earth ( 11.2 Km/s ) .

- #4

Drakkith

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I'm about to head to bed, but I'll try to remember to come back to this after I wake up tomorrow.

- #5

Erland

Science Advisor

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I get 3.31081057847891 *10^-18 with GNU Octave.

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fresh_42

Mentor

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The ordinary Windows calculator gives the same result.I get 3.31081057847891 *10^-18 with GNU Octave.

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Thank you Erland. - Yes, - I found, - many hours later, the same number that YOU have come up with. I'm going to have a look at that "GNU Octave" you've mentioned. - Once again, - many thanks.I get 3.31081057847891 *10^-18 with GNU Octave.

- #9

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- Thank you Delta for you r effort too ! - Also : - No. The answer is the Work done. Then negating that answer, gives the Potential Energy accumulated by that

movement ( out to the greater distance ). - Once again many thanks.

- #10

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- I must apologize for my reply to you. I was driving along in the car the next day, and realized how dumb what I wrote was. - You were basically correct, ( except you must negate like I said ) - then dividing by the distance gives the average force, - like you said. - Thanks again.

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