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PHY221 Ch3: Rel. Motion and Circular Motion

PHY221 Ch3: Rel. Motion and Circular Motion. Relative Motion Accelerated frames and inertial frames Circular motion. PHY221 Ch3: Rel. Motion and Circular Motion. Main Points. Relative Motion: The relationship between expressed in F and F’. P. y’. y. x’. O’. O. x.

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PHY221 Ch3: Rel. Motion and Circular Motion

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  1. PHY221 Ch3: Rel. Motion and Circular Motion Relative Motion Accelerated frames and inertial frames Circular motion

  2. PHY221 Ch3: Rel. Motion and Circular Motion Main Points Relative Motion: The relationship between expressed in F and F’ P y’ y x’ O’ O x Example: swimming in a river:

  3. PHY221 Ch3: Rel. Motion and Circular Motion Main Points Accelerating Frames have effects you can feel Example of car accelerated w/ respect to Earth: Inertial frames are non-accelerating frames

  4. PHY221 Ch3: Rel. Motion and Circular Motion Main Points Uniform Circular Motion with v=cst at Radius=r Kinematics: relationship r, v and w: Components of : Velocity vector Changes and acceleration from : Centripetal acceleration in terms of v and r , or w and r :

  5. PHY221 Ch3: Rel. Motion and Circular Motion Main Points Questions: What is the acceleration that the girl must generate on the rock for it to land at distance d from her feet (R is the length of string, and h the height of twirling plane above ground) Rock twirl in hor. Plane above head. Which way when string is cut?

  6. Ch 3: Assignments

  7. Ch 3: Assignments

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