EP Chap7 - Chap 7 Work and kinetic energy Note this is an...

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1 Chap 7 Work and kinetic energy 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: Checkpoint 1 : Δ K =W . Note that K can never be negative, Δ K can be positive or negative. P.9 . You can start out with and then find the initial ( v 0 ) and final ( v ) velocities. To find the v , first find the acceleration from the information given, then find v . P19. The tension T (cord force) is not equal to mg since the block has an acceleration. You must find the tension using Newton’s second law before you can find the work done by the tension. P50 b) Note: k = 2.5 N/cm = 250 N/m, d) . You will have to solve a quadratic equation P71. The zero on the scale is not the equilibrium position of the untensioned spring. Call the untensioned position
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EP Chap7 - Chap 7 Work and kinetic energy Note this is an...

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