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Midterm II-I-v2 - Midterm II Physics 8A Section 1(Fajans...

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Midterm II Physics 8A, Section 1 (Fajans) 4/7/2010 You may use two sides of one 8.5x11 sheet of notes. No calculators, cell phones or other electronics will be allowed; they must remain off and in your bags for the duration of the exam. Please show your work. We will give partial credit; you will not receive any credit if we cannot determine how you came up with an answer. If you continue your work onto a discontinuous page, please write “continued later” on the earlier page; otherwise your later work may be overlooked. Note that the four problems are not of equal difficulty, but are awarded equal points. Do not get stuck on a problem or part that you cannot do! If you have any questions, please ask the proctors. Tear off these first three sheets of paper; do not turn them in. Possibly useful formulas: 2 2 1 0 0 at t v x x + + = at v v + = 0 ax v v 2 2 0 2 + = 2 2 0 0 0 2 x v g x v v y x x y = dt dx v = dt dv a = dt dv m ma F = = 2 r mM G F G = N F N F s fr k fr µ µ = f π ω 2 = ω r v = 2 2 ω r r v a = = 2 2 ω mr r v m F = = T f 1 = = = = t F dt F v m p I = i i i v m p dt dp F ext = 1 1 2 2 1 2 cm i i i i i m x m x x m m m x m + = + =
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