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Circular motion

Circular motion. About angular motion. Which angle is bigger?. 5 degrees 5 radians 5 revolutions. Is rotating my arm quickly an example of angular acceleration?. Yes no. In class, a red ball was moved in a circle by a motor. The ball started at rest. The motor turned on.

isabelle-barrett
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Circular motion

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  1. Circular motion About angular motion

  2. Which angle is bigger? • 5 degrees • 5 radians • 5 revolutions

  3. Is rotating my arm quickly an example of angular acceleration? • Yes • no

  4. In class, a red ball was moved in a circle by a motor. • The ball started at rest. • The motor turned on. • The ball sped up until it reached the motor’s “maximum” velocity. • The motor was turned off. • The ball slowed down until it stopped.

  5. Does the red dot experience alpha (angular acceleration) after revolving a while, while the motor is still on? • Yes • no

  6. Does the red dot experience alpha ever after turning motor on? • Yes • No

  7. Does the red dot experience alpha ever after turning motor off? • Yes • No

  8. After turning off the CCW (counter-clockwise) motor, is ang. Accel… • Positive • negative

  9. After turning off the CW (clockwise) motor, is ang. Accel… • Positive • negative

  10. Is the red ball angularly accelerating? [moving in circle, constant speed] • Yes • No

  11. Is the red ball accelerating? [moving in circle] • Yes • No

  12. Which direction is the tangential velocity at the top of a CCW circle • Up • Down • Left • Right

  13. Which direction is the tangential velocity at the bottom of a CCW circle • Up • Down • Left • Right

  14. Blank slide

  15. Which direction is the centripetal acceleration at the bottom of a CCW circle • Up • Down • Left • Right

  16. Which direction is the centripetal acceleration at the top of a CCW circle • Up • Down • Left • Right

  17. Which way is the constant-speed object accelerating in a circle? (on left, moving CCW) • Up • Down • Left • right

  18. Which way to turn the car to make your date slide towards you? • Right • Left

  19. Which force is bigger at bottom of a vertical circle? • T • Mg • same

  20. Have you listened to any podcasts? • Yes • No

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