Two moons in orbit, an answer to the first challenge in "Free fall"
I got the ballot for this project but there is some server problem and I cannot view the project. It is discouraging to be rejected so I'm putting nominally a score without looking at the actual project here.
A few days ago I also received a ballot and couldn't open this project.
Today, I stil get an error message when trying to open it.
Carlos, Yoshiki: I don't understand the problem. I reported it under the following ticket, and await a response from a Showcase expert (though the tracker is not accessible today.)
There aren't two moons. The description is meant to read: "A captured comet orbits in two dimensions."
If you like this, you will also like Randy Caton's project from a couple of years ago: "Planet around Sun"
Randy's version allows a deeper exploration of the importance of the time steps, by including a time step variable "dt" that I hid from my own calculations. He also exposes the energy, the area swept out, and the angular momentum to your scrutiny. It was made before Etoys got "function tiles" so it shows what can be achieved with simple arithmetic. More of Randy's projects in mechanics can be found at:
I posed a challenge on page 11. My personal response to the challenge is http://squeakland.org/showcase/project.jsp?id=9739 ("Free fall two")
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