Objectives
1. Define torque and describe what it depends on.
11.2 Balanced Torques
2. Describe the condition for one torque to balance another.
11.3 Torque and Center of Gravity
3. 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.
11.4 Rotational Inertia
4. Describe what the rotational inertia of an object depends on.
11.5 Rotational Inertia and Gymnastics
5. Give examples of how a gymnast changes the rotational inertia of the body in order to
change the spin rate.
11.6 Angular Momentum
6. Define angular momentum and describe the conditions under which it remains the same and
the conditions under which it changes.
11.7 Conservation of Angular Momentum
7. Give an example of a situation in which the rotational speed changes but the angular
momentum does not.
Misconceptions
Note: The following statments are all FALSE!!!
1. Torque and force are the same concept.
2. Inertia and rotational inertia are much the same concept.