N-Body Gravity Sandbox

Tentang simulasi ini

Students choose a mass from moon to star, click to place a body and drag before releasing to give it a velocity. Gravity acts between all bodies, so they can build a star with a planet in circular orbit, a small system with one button, or a chaotic three-body dance. Trails show paths, and readouts show body count, total and kinetic energy, next mass and the number of merges. Bodies that touch combine. The sim shows that orbits are falling paths shaped by F = G m1 m2 / r squared. Teachers can ask for stable orbits.

Yang bisa dijelajahi siswa

Choose 200 (star), click near the centre, then place a 1 (moon) body and drag to throw it sideways.
Adjust the drag length until the moon stays in a near-circular orbit around the star.
Press Add a small system and watch several bodies orbit with Trails switched on.
Throw a body straight at the star and watch the Merges readout when they touch.
Turn off Click places bodies to orbit the camera, and press Clear all to start again.

Tujuan pembelajaran

1Describe how gravity pulls every body toward every other body.
2Relate launch speed to whether an orbit is circular, elliptical or escapes.
3Explain why systems with three or more bodies can become chaotic.
4Observe energy and mass changes when bodies merge.

Pertanyaan yang sering diajukan guru

Is it free to use?

Yes. It is completely free, needs no sign-up, and runs in any modern browser, including classroom whiteboards, tablets and phones. Just open the page and start.

Why do orbits get messy with three bodies?

With two bodies the orbits are tidy ellipses, but with three or more there is no general formula for the motion. Small changes grow quickly, so the orbits can become chaotic.

How do I launch a body?

Select a mass, click where you want the body, and drag before releasing. The drag sets the launch velocity. Keep Click places bodies switched on, and press Clear all to remove everything.

What keeps a planet in orbit?

Gravity pulls the planet toward the star while its sideways motion carries it onward. It keeps falling toward the star but keeps missing it, so it circles around.

Sematkan simulasi ini

Pasang di LMS, blog, atau situs kelas Anda — gratis.

<iframe src="https://kiwibee.io/id/simulations/nbody-gravity-sandbox-3d-simulation/embed" title="N-Body Gravity Sandbox | KiwiBee" loading="lazy" allowfullscreen style="width:100%;height:min(70vh,620px);min-height:420px;border:0;border-radius:16px"></iframe>

Lanjut menjelajah

Explore an adult male reference body in 3D. Reveal 14 anatomical systems, search thousands of named structures, isolate organs, and pull 2,209 modeled pieces apart to see how the body is organized.

—

Explore the head and neck in 3D: 643 source meshes across 14 layers, 47 facial and masticatory muscles, and 77 drawn nerves, vessels and glands the source scan omits. Open any tooth onto its own pulp canal, and follow the seven stages of tooth development.

—