1 / 25

Chapter 7.3

Chapter 7.3. Circular Motion. Uniform Circular Motion. Motion at constant speed in a circle. v 1. D r. v 2. r 1. r 1. r 2. r 2. v 1. D v. v 2. D r D v r v. =. . D r D v r D t v D t. =. D r/ D t = v D v/ D t = a. . v a r v. =. . v 2

hanne
Télécharger la présentation

Chapter 7.3

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. Chapter 7.3 Circular Motion

  2. Uniform Circular Motion • Motion at constant speed in a circle

  3. v1 Dr v2 r1 r1 r2 r2 v1 Dv v2

  4. Dr Dv r v = \ Dr Dv rDt vDt =

  5. Dr/Dt = v Dv/Dt = a \ va r v = \

  6. v2 r ac =

  7. Centripetal Acceleration (ac) • Acceleration towards the center of a circle in uniform circular motion

  8. 4p2r T2 ac =

  9. Centripetal Force (Fc) • The force that causes centripetal acceleration

  10. mv2 r Fc =

  11. m4p2r T2 Fc =

  12. A 5.0 kg ball is attached to the end of a 2.0 m string and swung at 4 revolutions per second. Calculate: ac & Fc

  13. Drill: A 25 g ball is attached to the end of a 500.0 cm string and swung at 5.0 revolutions per second. Calculate: ac & Fc

  14. The NASA space station spins with a diameter of 100.0 m. Calculate the period required to create an ac of 9.8 m/s2:

  15. Calculate the speed a roller coaster must achieve to spin in a vertical circle with a diameter of 10.0 m:

  16. A 2.5 kg ball is attached to the end of a 125 cm string and swung at 2.0 revolutions per second. Calculate: ac, vball, & Fc

  17. A 50.0 kg box slides down an 250 m inclined plane that is 37o from horizontal with an acceleration of 2.5 m/s2. Calculate F||, F, Fnet, Ff, vf, & m on the incline and a & dH on the flat.

  18. An arrow is fired at 50.0 m/s at 53o from horizontal. Calculate: dH & dV at 1.0 s, 2.0 s, 3.0 s, & max dH & dV

  19. A 10.0 g box slides down an 25 cm inclined plane (m = 0.20) that is 45o from horizontal. Calculate F||, F, FN, Ff, Fnet, a, & vf on the incline.

  20. Test Review

  21. A ball thrown at 15 m/s from a 490 m tower. Calculate: vV, dV& dH at 1.0 s, 2.0 s, 3.0 s, & maximum vV & dH

  22. Drill: A bullet is fired horizontally at 750 m/s from a height of 4.9 m. Calculate: tair, dH, & maximum vV

  23. A ball is thrown from the ground at 20.0 m/s at an angle of 53o from horizontal. Calculate: tup, dVup, tair, & dH

  24. A 40.0 g ball is traveling in a circular path with a diameter of 10.0 cm at 25 cm/s. Calculate: ac & Fc

  25. A 2500 kg carosel with a diameter of 20.0 m spins at 6.0 revolutions per minute. Calculate: ac & Fc

More Related