David Pundak

Projectile and Satellite Orbits part of comPADRE Pedagogic Library:Interactive Lectures:Examples
Gravitation introductory activity with interesting animation. The activity allows the student to revile the connection between the initial speed and the shape of satellite orbit. -

The Elliptic Orbit part of Starting Point-Teaching Entry Level Geoscience:Interactive Lecture Demonstrations:Examples
Planet motion around a star - introductory activity with interesting animation. The activity allows the student to revile the connection between the kinematics of planet and energy of the planet along the orbit. -