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 speed or velocity? Displacement or distance? Distance-time graph examples velocity-time graphs acceleration velocity-time graph examples forces - balanced and unbalanced F=ma (Forces cause acceleration - Newton's 2nd law) weight (not mass) freefall stages stopping a car momentum (not on dual award) car crashes and vehicle safety Newton's 3rd law (action and reaction) moments moments at bridges (not on dual award) centre of gravity moments examples stability (centre of mass) Hooke's law (stretching things) orbits and forces including comets orbital speed formula the universe.

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