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Rev

$\begingroup$ You haven’t shown the Excel formulas for the velocity or position. Are you using the acceleration calculated in B4? If so, that’s only the initial acceleration. $\endgroup$
– Ghoster
Commented Apr 22, 2023 at 5:20
$\begingroup$ @ghoster oh yes, the acceleration must be recalculated every step. i will update. $\endgroup$
– James
Commented Apr 22, 2023 at 5:23
$\begingroup$ The balls separated by 1 meter will hit each other in 2.93 days. The earth and the sun in the same situation will hit in 65.05 days. $\endgroup$
– James
Commented Apr 22, 2023 at 11:41
$\begingroup$ @James hi, can I have your excel file please ? I'm not very good at excel $\endgroup$
– Michael
Commented Apr 22, 2023 at 14:33
1

$\begingroup$ @James 2.93 days This agrees with the analytic formula. $\endgroup$
– Ghoster
Commented Apr 22, 2023 at 16:05

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