# At Wood i need Introduction and Purpose: Discussion / Conclusion: and all the question below Atwood’s Machine By: Jackson Widener Thomas Jer

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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) 1 200 200 0 0 0 400 2 195 205 0.271 0.245 10 400 3 190 210 0.41 0.49 20 400 4 185 215 0.557 0.735 30 400 5 180 220 0.625 0.98 40 400 Part II: Keeping The Mass Difference Constant Trial m1 (g) m2 (g) Acceleration (m/s2) Calculated Acceleration m (kg) mT (kg) 1 120 100 0.594 20 220 2 140 120 0.557 20 260 3 160 140 0.502 20 300 4 180 160 0.486 20 340 5 200 180 0.453 20 380

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?

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