Astro Academy: Principia - collisions

This collection of videos show ESA Astronaut, Tim Peake, on the International Space Station, demonstrating the physics of collisions.  In this free-fall environment, Tim can demonstrate how objects collide without the observed effects of gravitational acceleration with similar experiments performed in the classroom.  The resources also contain videos where the motion has been tracked using free online software, called Tracker.  The Tracker files are also provided as part of the resources.