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Introduction and Purpose:
Discussion / Conclusion:
and all the question below
Atwood’s Machine
By: Jackson Widener
Thomas
Jeremy
Sixto
Eric
Introduction and Purpose:
Diagram:
Data:
|
Part I: Keeping Total Mass Constant |
|||||||||||||
|
Trial |
m1 (g) |
m2 (g) |
Acceleration (m/s2) |
Calculated Acceleration |
m (kg) |
mT (kg) |
|||||||
|
1 |
2 0 0 |
0 |
40 0 |
||||||||||
|
2 |
195 |
205 |
0.271 |
0.245 |
10 |
||||||||
|
3 |
190 |
210 |
0.41 |
0.49 |
20 | ||||||||
|
4 |
185 |
215 |
0.557 |
0.735 |
30 |
||||||||
|
5 |
180 |
220 |
0.625 |
0.98 |
40 | ||||||||
|
Part II: Keeping The Mass Difference Constant |
|||||||||||||
|
120 |
100 |
0.594 |
|||||||||||
|
140 |
260 |
||||||||||||
|
160 |
0.502 |
300 |
|||||||||||
|
0.486 |
340 |
||||||||||||
|
0.453 |
380 |
Discussion / Conclusion:
Questions:
1. Draw a free body diagram of m1 and another free body diagram of m2. Using these diagrams, apply Newton’s second law to each mass. Assume that the tension is the same on each mass and that they have the same acceleration. From these two equations, find an expression for the acceleration of m1 in terms of m1, m2, and g. Compare the expression to your result in Step 5 of Analysis.
2. For each of the experimental runs you made, calculate the expected acceleration using the expression you found with Newton’s second law of motion and the specific masses used. Compare these figures with your experimental results. Are the experimental acceleration values low or high? Why?
3. An unknown mass can be placed on one side of the Atwood’s machine. Using lab measurements and any necessary calculations, the mass of the unknown can be determined. Try it.
4. How does the force exerted upward by the pulley change as the system begins accelerating? Why? Set up an experiment to determine how this force changes.
5. How does the tension in the string change as the masses start to move? Or does it?
