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:
 ... distinguish between rotations and revolutions.
 ... distinguish between linear velocity and rotational velocity, and
discuss the relation between them.
 ... define centripetal acceleration, and tell the direction in
which a centripetal acceleration acts.
 ... calculate the centripetal acceleration of an object using a = v^{2}/r.
 ... define centripetal force, tell the direction in which a
centripetal force acts, and give examples of centripetal forces.
 ... calculate the centripetal force on an object using F = mv^{2}/r.
 ... 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.
 ... 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 merrygoround.
 WRONG: An object moving in a circle at
constant speed is not accelerating.
 WRONG: There is an outwardpointing force on
an object moving in a circle.
last update June 6, 2008 by JL Stanbrough