# Physics Lab Circular Motion

Topics: Observational error, Measurement, Accuracy and precision Pages: 3 (461 words) Published: May 28, 2013
I. TITLE: Investigating Circular Motion
II. Objective: To find the mass of an object through the use of formulas and concepts known in relation to circular motion III. DATA:
* Radius (r): 29.00cm .29m + 0.05
* Cork: 12.55g 0.012kg + 0.001
Data Table 1:
| Trials| Time (s)+ 0.01| Average Time for 10 Rev. (s) + 0.01| Period (T)+ 0.001| Force (N)+ 0.005| .100kg| 1| 4.10s| 4.08s| .408 s| .981N|
| 2| 3.70s| | | |
| 3| 3.80s| | | |
| 4| 4.70s| | | |
.050kg| 1| 4.70s| 5.03s| .503 s| .491N|
| 2| 5.00s| | | |
| 3| 5.20s| | | |
| 4| 5.20s| | | |
.020kg| 1| 7.60s| 7.53s| .753 s| .196N|
| 2| 7.60s| | | |
| 3| 7.50s| | | |
| 4| 7.40s| | | |

Data Table Analysis:

IV. DATA ANALYSIS (Processing):
Graph 1:
Graph analysis:

Calculations:

.100kg + mass

.50kg + mass

.20kg + mass

V. ERROR ANALYSIS
.100kg + 0.01 mass
% error = (accepted - experimental)/accepted x 100
% error = 0.012 – .0143/ 0.012 x 100
% error = 14% error

.50kg + 0.01 mass
% error = (accepted - experimental)/accepted x 100
% error = 0.012 – .0109 / 0.012 x 100
% error = 9% error

.20kg + 0.01 mass
% error = (accepted - experimental)/accepted x 100
% error = 0.012 – .0097 / 0.012 x 100
% error = 22% error

SOURCES OF ERROR:
Random error: Human eye, vertical angle of the object in circular motion is not perfect, recording on the stopwatch. Systematic error: Non that I could detect

VII. CONCLUSIONS & EVALUATION:
Positive and Negative aspects (Benefits and Limitations)

As I was performing the experiments that were necessary to gather the data in order to complete this task, I realized that regardless of the high accuracy and precision of my recordings I had to change several steps in the procedure in order to make my results successful. The following were my limitations. * The person that was flinging the cork in a circular motion could never...