Lrm fall 2011_circular motion_ponderables
- 1. Ponderable #1 Assign roles in your group and discuss the problems for today that were posted on Blackboard. You may check your work against the solutions that now are available on Blackboard. Where you are having difficulty understanding the solutions, discuss them with the other groups at your table. Where helpful, remember to draw a picture of the problem first and then create the Free Body Diagram. 1
- 2. Ponderable #2 In your groups, work on the following problem: A CD drive in a computer spins the 12-cm-diameter disks at 10,000 rpm. a.What are the disk’s period (s) and frequency (rev/s)? b.What would be the speed of a speck of dust on the outside edge of this disk? c.What is the acceleration that this speck of dust experiences? Discuss your results with other students at your table. Include your work in your group’s activity report. 2
- 3. Ponderable #3 In your groups, work on the following problem: A hamster runs in its wheel for 4.3 hours every night. If the wheel has a 6.8 cm radius and its average angular velocity is 3.0 radians per second, how far does the hamster run in one night? Discuss your results with other students at your table. Include your work in your group’s activity report. 3