Physics Weekly

Class Pages

Chapter 8: Rotational Motion
Marymount High School
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Physics Syllabus

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Judith S. de Nuño
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Chapter Objectives:

  • Distinguish between rotate and revolve.
  • Describe rotational speed.
  • Give examples of centripetal force.
  • Describe the motion of an object if the centripetal force acting on it ceases.
  • Explain why centrifugal force is "fictitious."
  • Describe how a simulated gravitational acceleration can be produced.
  • •Define and describe torque.
  • Describe the condition for one torque to balance another.
  • Describe center of gravity.
  • Describe center of mass
  • Describe how to find the center of gravity of an irregularly shaped object.
  • Given the location of the center of gravity of an object and the position and direction of the forces on it, tell whether the forces will produce rotation.
  • Describe on what the rotational inertia of an object depends.
  • Define angular momentum and describe the conditions under which it (a) remains the same and (b) changes.
  • Give an example in which rotational speed changes but angular momentum does not.

Chapter Terms:

  • tangential speed
  • rotational speed
  • rotational inertia
  • torque
  • center of mass (CM)
  • center of gravity (CG)
  • equilibrium
  • centripetal force
  • dentrifugal force
  • angular momentum
  • conservation of angular momentum

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Chapter Formulas:

Torque = lever arm x force

Chapter Outline Framework:

  • Circular Motion
  • Rotational Inertia
  • Torque
  • Center of Mas and Center of Gravity
    • Locating the center of Gravity
    • Stability
  • Centripetal Force
  • Centrifugal Force
  • Centrifugal Force in a Rotating Reference Frame
  • Simulated Gravity
  • Angular Momentum
  • Conservation of Angular Momentum

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