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Unformatted text preview: Friction is given by μ k. m θ Physics 1D03  Lecture 8 6 Example Obtain an expression for the stopping distance for a skier moving down a slope with friction with an initial speed of v 1 . Find the distance given that μ k =0.18, v=20m/s and θ=5.0º. θ d Physics 1D03  Lecture 8 7 Increasing θ so that , the block slips, from which we get: f n mg s μ This is an easy method of measuring max θ= max tan μ= s Question : Can we calculate μ s ? Physics 1D03  Lecture 8 8 M m θ Frictionless surfaces, ideal pulleys, etc. For what angle θ is the system in equilibrium? Physics 1D03  Lecture 8 9 Summary Problems using Newton’s Second Law: Set up freebody diagram, then and solve. , a F m = ∑ Practice Problems : Chapter 5 Problems: 43, 46 (ans: 31.748.6N ),...
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 Spring '09
 MCKAY
 Physics, Force, Jewett

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