Objectives
1. Define rotation. Give examples of things that rotate.
2. Define revolution. Give examples of things that revolve.
9.2 Rotational Speed
3. Distinguish between linear speed and rotational speed, and explain what each
depends on.
9.3 Centripetal Force
4. Explain the acceleration of an object moving in a circle at a constant speed.
5. Define centripetal force. Give examples of centripetal force.
6. Find the magnitude of the centripetal force.
7. Analyze and solve problems involving object moving in vertical circles.
8. Find critical speed for objects traveling in vertical loops.
9.4 Centripetal and Centrifugal Forces
9. Describe the resulting motion of an object if the centripetal force acting on it
ceases.
10. Explain why it is incorrect to say that a centrifugal force pulls outward on an object being whirled in a circle.
9.5 Centrifugal Force in a Rotating Reference
11. Explain why a ladybug in a whirling can would experience what seems to be
an outward force, and why a physicist would label this a fictitious force.
9.6 Simulated Gravity
12. Describe how a simulated gravitational acceleration can be produced in a
space colony.
Misconceptions
Note: The following statements are all FALSE!!!
1. Linear speed and rotational speed are the same.
2. The linear speed on a rotating surface is the same at all radial distances.
3. Things moving in a circular path are pulled outward by some force.
4. If the string breaks on an object pulled into a circular path, the object will
move radially outward.