Physics 1 - Chapter 9 Circular Motion Terms & Objectives     Note: The following terms and objectives are based on the Indiana Standards 2000 for Physics 1. You may download the complete physics standards by clicking here, or view the standards relevant to Chapter 9 - Circular Motion here.

New Terms in Chapter 9:

 axis rotation revolution rotational speed linear speed centripetal acceleration centripetal force centrifugal force rotating reference frame simulated gravity fictitious force

Chapter 9 Objectives:

When you have completed chapter 9, you should be able to:

1. ... distinguish between rotations and revolutions.
2. ... distinguish between linear velocity and rotational velocity, and discuss the relation between them.
3. ... define centripetal acceleration, and tell the direction in which a centripetal acceleration acts.
4. ... calculate the centripetal acceleration of an object using a = v2/r.
5. ... define centripetal force, tell the direction in which a centripetal force acts, and give examples of centripetal forces.
6. ... calculate the centripetal force on an object using F = mv2/r.
7. ... distinguish between centripetal force and centrifugal forces, and tell how centrifugal forces seem to arise in rotating reference frames, and tell why the centrifugal force is a fictitious force.
8. ... describe how gravity can be simulated in space and how the rotation of the Earth affects weight.

Possible Misconceptions to Correct:

Do you believe that any of the following statements are true? They AREN'T! When you finish Chapter 9, you should understand that each of these statements is FALSE, and WHY.

• WRONG: Rotating and revolving are the same thing.
• WRONG: Your linear speed is the same no matter where you sit on a merry-go-round.
• WRONG: An object moving in a circle at constant speed is not accelerating.
• WRONG: There is an outward-pointing force on an object moving in a circle.     last update June 6, 2008 by JL Stanbrough