1 / 8

Uniform Circular Motion

Uniform Circular Motion. Homework: Read pages 153 – 156 P 156 Answer questions: 12, 13, 14, 15. Definition: the motion of an object in a circular path with a constant speed. When does this happen?. Driving a car at constant speed around a circular corner OR.

stefan
Télécharger la présentation

Uniform Circular Motion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Uniform Circular Motion Homework: Read pages 153 – 156 P 156 Answer questions: 12, 13, 14, 15 Definition: the motion of an object in a circular path with a constant speed

  2. When does this happen? • Driving a car at constant speed around a circular corner OR

  3. Speed in a circular path Recall: to find speed V = distance / time for a circular path d = 2 p r the time required to complete one full revolution is called the period (T) Therefore, v = 2pr / T

  4. Constant speed, but what about velocity? • Velocity of an object undergoing UCM is always directed tangent to the circular path • Direction is constantly changing, velocity is not constant • Therefore, the object must be accelerating

  5. Centripetal Acceleration • Acceleration experienced by an object moving in a circular path at a constant speed. • Directed to the center of the circular path • centripetal means “center seeking” ac = V2 / r

  6. Centripetal Force • Force directed toward the center of the circular path • Causes the centripetal acceleration Fc = m ac

  7. Do Now Assume that the moon orbits the Earth in a circular orbit in 27.32 days. Using the List of Physical Constants on your Reference Tables, calculate the following: • the speed of the moon in its orbit. • the centripetal acceleration experienced by the moon • the centripetal force that keeps the moon in its orbit.

  8. The answers: • V = 1022 m/s • ac = 0.00272 m/s2 • 2.0 x 1020 N

More Related