Forces and Motion REVISION PODCAST (Edexcel IGCSE physics topic 1)

This revision podcast is for Edexcel IGCSE physics (4PH0 or 4SC0), and covers all of topic 1 - forces and motion. It is also suitable for other GCSEs. start - distance time graphs 0:59 speed or velocity? 1:24 displacement or distance? 1:37 distance-time graph examples 2:51 velocity-time graphs 4:15 acceleration 4:45 velocity-time graph examples 6:20 forces - balanced and unbalanced 7:37 F=ma (Forces cause acceleration - Newton's 2nd law) 8:55 weight (not mass) 10:00 freefall stages 12:18 stopping a car 13:52 momentum (not on dual award) 16:29 car crashes and vehicle safety 17:12 Newton's 3rd law (action and reaction) 18:00 moments 19:03 moments at bridges (not on dual award) 19:44 centre of gravity 20:49 moments examples 21:40 stability (centre of mass) 22:38 Hooke's law (stretching things) 24:40 orbits and forces including comets 25:40 orbital speed formula 27:00 the universe