Unformatted text preview: determine the speed of the skier at the bottom of the slope. g Δ h + 1/2(v f 2 – v i 2 ) = 0 v f = sqrt[-2gDh] = sqrt[(2)(10)(300)] = sqrt ≈ 77 m/s h θ m 2. The potential energy graph shown here is similar in shape to the 2-d Higgs potential in particle physics. The horizontal axis here is given in meters and the vertical axis in Joules. a) At which point ( A or B ) would the force be greatest? Clearly explain your reasoning. Point A would have a greater force than point B. Force is related to slope, and the slope at B=0 whereas the slope at A is >0. [Note that it doesn’t matter which direction you think the force is (pos or neg slopes), just that the magnitude is bigger.] b) In which direction is the force at point C ? Explain . A C B The force at point C is to the left. Force is always in the direction to locally decrease the PE....
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This note was uploaded on 04/04/2011 for the course PHY 7A taught by Professor Pardini during the Spring '08 term at UC Davis.
- Spring '08