CK-12 Foundation
Orbital Motion
Why do planets orbit the sun in ellipses when moons orbit their planet in circles? Pupils control the semi-major axis, eccentricity of the orbit, and position angle. The resulting orbital appears with the related force vectors as...
Physics Classroom
The Physics Classroom: Circular and Satellite Motion: Orbital Motion Interactive
This simulation of a satellite's elliptical motion around a central body allows students to alter the eccentricity of the orbit while learning about velocity and force vectors.