Energy Formulas - The following formulas or concepts should...

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The following formulas or concepts should be learned by heart when you prepare for the test. x x y y z A B A B A B A B = + + G G z Or cos A B AB φ = G G when A and B is the magnitude of A G and B G ˆ ˆ ˆ x y z x y z i j k A B A A A B B B × = G G (you should know how to calculate this) or sin A B AB φ × = G G You should know how to determine the direction of the vector product. F ma = G G 0 v v at = + 2 0 0 1 2 x x x x v t a t = + + or 2 0 1 2 oy y y y v t a t = + + Centripetal acceleration : 2 v a r = Frictional force : f n μ = n: normal force Kinetic energy : 2 1 2 mv Work done by force : W F d = G G s Work-energy theorem : 2 2 1 1 2 2 tot f i W mv m = v Power : dW P dt = Potential energy by gravity : mgh
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