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Physics 101: Chapter 8 Rotational Kinematics

Physics 101: Chapter 8 Rotational Kinematics. Today’s lecture will cover Textbook Chapter 8. See text: chapter 8. And for a point at a distance R from the rotation axis:. x T = R  v T =  R  a T =  R. Rotational Kinematics (with comparison to 1-D kinematics).

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Physics 101: Chapter 8 Rotational Kinematics

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  1. Physics 101: Chapter 8Rotational Kinematics • Today’s lecture will cover Textbook Chapter 8

  2. See text: chapter 8 And for a point at a distance R from the rotation axis: • xT = RvT= R aT = R Rotational Kinematics(with comparison to 1-D kinematics) Angular Linear See Table 8.1

  3. Angular and Linear (tangential) Variables

  4. CORRECT Chapter 8, Preflight You and a friend are playing on the merry-go-round at Carle Park. You stand at the outer edge of the merry-go-round and your friend stands halfway between the outer edge and the center. Assume the rotation rate of the merry-go-round is constant. Who has the greatest angular velocity? 1. You do 2. Your friend does 3. Same since the angular displacement is the same in both cases

  5. CORRECT Chapter 8, Preflight Who has the greatest tangential velocity? 1. You do 2. Your friend does 3. Same This is like the example of the "crack-the-whip." The person farthest from the pivot has the hardest job. The skater has to cover more distance than anyone else. To accomplish this, the skater must skate faster to keep the line straight.

  6. CORRECT Chapter 8, Preflight Who has the greatest centripetal acceleration? 1. You do 2. Your friend does 3. Same Similar to the coin on the 45 record experiment-----things toward the outer edge want to "fly off" more than things toward the middle. Force is greater on you because you want to fly off more.

  7. Centripetal Acceleration and Tangential Acceleration (EXAMPLE)

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