# EP Chap2 - Chap 2 Motion along a straight line Note this is...

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1 Chap 2 Motion along a straight line Note – this is an outline of the lecture, print this and take notes on it in lecture It is not the and take notes on it in lecture. It is not the complete lecture. You should attend lecture to get the complete notes Images taken from Halliday/Resnick/Walker, Fundamentals of Physics, 7 th Edition, John Wiley and Sons Inc., by permission. Hints on HW 19 (c) When you differentiate x ( t ) to find its maximum value you will end up with a quadratic equation. This equation has two solutions. Choose the correct one! 31. Read off x 0 directly from the graph. Now apply x x = v a 2 to two other points (you should get 0 = 0 t + ½ at to two other points (you should get two equations that you can solve for a and v 0 ). 61. Integrate v = d x / d t to find distance Position and Displacement Displacement (1-d) = final position - initial position 1 2 x x x = Δ Average velocity (1-d) 1 2 1 2 t t x x t x v avg = Δ Δ = Average speed t s avg Δ = distance total Example Position of armadillo as a function of time Example m/s 2 s 3 m 6 = = Δ Δ = t x v avg For t = 1 – 4 s distanc tota They are the same m/s 2 s 3 m 6 distance total = = Δ = t s avg

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2 SP2-1 Drive along a straight road for 8.4 km at 70
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EP Chap2 - Chap 2 Motion along a straight line Note this is...

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