Physics 141-Chapter 61 Force & Motion Outline: Friction (Static and kinetic). The Drag force and Terminal Speed. Uniform Circular Motion. Chapter 6.

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Physics 141-Chapter 61 Force & Motion Outline: Friction (Static and kinetic). The Drag force and Terminal Speed. Uniform Circular Motion. Chapter 6

Physics 141-Chapter 62 Force and Motion Ffsfs N W Stationary Block: N W Applying a small force F: Increasing F:

Physics 141-Chapter 63 Static Forces of friction FN W FxFx FyFy fsfs

Physics 141-Chapter 64 Kinetic Forces of friction f FxFx F x = f s,max f s,max fkfk Kinetic Forces of friction

Physics 141-Chapter 65 Example 1: N Determining the coefficient of static friction W sin(  ) W cos(  ) W fsfs

Physics 141-Chapter 66 Example 2: A block slides on a rough incline fkfk W W sin( ) W cos( ) N

Physics 141-Chapter 67 Example 3 Two blocks on top of each other F m1m1 m2m2 no friction Friction 1) Find max applied Force F such that the two blocks move together. 2) If F =60 N, Find the acceleration of the blocks

Physics 141-Chapter 68 Example 4 A block pushed against a vertical wall m1m1 Find max applied Force F such that the block will not slide down the wall F

Physics 141-Chapter 69 Solution A block pushed against a vertical wall m1m1 F N W f s,max

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