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OCR (A) Unit G484 [Physics A2] key definitions

Term Definition
Newtonian laws of motion
Newton's 1st law An object will remain at rest or keep travelling at a constant velocity
unless an external force acts on it
Newton's 2nd law The net force of an object is equal to the…

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Solid (Spacing, ordering, Spacing: Closely packed
motion) Ordering: Regular order
Motion: Vibrations about a fixed point
Liquid (S,o,m) Spacing: Closely packed (less packed than solids)- more gaps between
particles than solids
Ordering: Less regular order
Motion: Particles can move past each other slowly compared to gases
Gas (S,o,m) Spacing: Molecules…


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