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As a start, I added an “acceleration factor”, af, making the equation a=af*f/m in both places where the equation is used. With values of around af=0.1 and also REMing out the air drag in both places [v=v*(1-.0001*v^2)], the whole thing plays out with a very nice looking resonance. However, I still h...

As a start, I added an “acceleration factor”, af, making the equation a=af*f/m in both places where the equation is used. With values of around af=0.1 and also REMing out the air drag in both places [v=v*(1-.0001*v^2)], the whole thing plays out with a very nice looking resonance. However, I still h...

Thank you for your detailed comments. They are very helpful. I have to look at them in detail. At 1st glance I’m not sure if I have explained my method clearly. 1) The velocity & acceleration are per “t”, not per actual second. At least that’s what I intended. Therefore d=.5*a*t^2 reduces to d=a/2, ...

Sounds interesting. Does it use the same “incremental changes” method? Or does it use actual equations? I have never tried 4, only 3 (Sun, Moon, & Satellite). I also made it work as Earth, Moon, & the Artemis II recent loop around the moon. I can post it if you’re interested.

Dutchman- Did you see the replies here? And my posting under this topic (BASIC Programs) ? (You indicated interest in it.)

Yes. You found it ok then?

It’s there now.

This simulation of 2 springs & weights “piggy-backed) together was suggested by Henko on Dutchman’s “Mass on Spring Resonance”. So I took up the “challenge”. :D It simulates the oscillations produced after pulling down & releasing the lower weight. I don’t know how accurate it is, but should give a ...

Sorry. Something went wrong in the uploading or Saving. It should be there by tomorrow.

I have posted a program per the suggestion above, called "Two Springs & 2 weights". It was quite a challenge! I have no idea how accurate it is, but it may give the right idea.