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# Physics AS Level (AQA) watch

1. Hi, just curious in which formulas i need to know that are not on the formula booklet.
I know I need to know:
1) W=m.g
2) F=m.g
3) s=1/2.g.t^2

And also what are Newtons 3 laws we haven't been taught this and i need to know
2. First law is every object in uniform motion will remain in that state of motion, unless a external force is applied on the object
Second law F=ma
Third law is every reaction, there is an equal and opposite reaction

For the equations just go through the textbook and any equations you need to know that are not on the equation sheet will be in the book
3. s = 1/2at^2 IS in the formula booklet - its written as s = ut + 1/2at^2 but if the objects has started at rest (u=0) then ut=0
4. W=Fs

Work done is force multiplied by displacement

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