p6 10

• Angular acceleration


  The rate of change of angular velocity with time
• Angular momentum


  The product of moment of inertia and angular velocity
• Change in angular velocity


  The difference between final and initial values of angular velocity
• Kinematics of rotational motion


  Describes the relationships among rotation angle, angular velocity, angular acceleration, and time
• Law of conservation of angular momentum

  
  

  Angular momentum is conserved, i.e., the initial angular momentum is equal to the final angular momentum when no external torque is applied to the system
• Moment of inertia


  Mass times the square of perpendicular distance from the rotation axis; for a point mass, it is and, because any object can be built up from a collection of point masses, this relationship is the basis for all other moments of inertia
• Right-hand rule


  Direction of angular velocity ω and angular momentum L in which the thumb of your right hand points when you curl your fingers in the direction of the disk's rotation
• Rotational inertia


  Resistance to change of rotation. The more rotational inertia an object has, the harder it is to rotate
• Rotational kinetic energy


  The kinetic energy due to the rotation of an object. This is part of its total kinetic energy
• Tangential acceleration


  The acceleration in a direction tangent to the circle at the point of interest in circular motion
• Torque


  The turning effectiveness of a force
• Work-energy theorem


  If one or more external forces act upon a rigid object, causing its kinetic energy to change from to , then the work done by the net force is equal to the change in kinetic energy