1. UCM Pre-Lab
Seo
Physics

2. To find the relationship of the amount of time per spin with the number of revolutions in a cycle
Objectives

3. Materials Stopwatch Meter stick Rubber Stopper Washers String
Plastic tube
Electronic Scale
Paper Clip
Alligator Clip
Materials

4. Roles Time Stopper (Measure Time for # of cycles)
3 PEOPLE IN ONE GROUP
Spinner (EVERYONE GETS TO TEST)
Time Stopper (Measure Time for # of cycles)
Data Recorder ( Total of 6 trials)
Mass Scaler (Scale masses of the stopper and washer)
Roles

5. Equations

6. Lab Part I (Radius)
1. Middle of the rubber stopper to the tip of the plastic tube needs to be 15 cm
2. Start with 1 washers
3. Collect 6 trials with Increments of 10 cm
**30 Revolutions per trial
4. Collect time that it takes to cycle 30 Rev. with a stopwatch
5. Show ALL work for Force and Velocity . NO MENTAL MATH!!
Radius (m)
Velocity (m/s)
0.15 m
0.25 m
0.35 m
0.45 m
0.55 m
0.65 m

7. Lab Part II (Washers) Start with 1 washers
1. Add 2 more washers for each trial. 6 Total trials
**30 Revolutions per trial
2. Collect time that it takes to cycle 30 Rev. with a stopwatch
3. Show ALL work for Force and Velocity . NO MENTAL MATH!!
Washer mass (kg)
Velocity (m/s)

8. Data Portion Using the Graphing Modification Chart, Modify the graphs
*2 Separate Graphs with Labels. AND 1 comparison Graph
Using the Graphing Modification Chart, Modify the graphs
*Shown Calculations with Data Chart:
1). Velocity
2). Centripetal Force

9. Conclusion