Lab Atwood's Machine PHY1111 (1)

release the masses. Catch the falling mass before it strikes the floor or the other mass strikes the pulley. 7. Select the region of the graph where the velocity was increasing at a steady rate. Click the “Linear Fit” button, circled below, to fit the line y = mx + b to the data. Record the slope, which is the acceleration, in the data table. 8. Continue to move masses from m 2 to m 1 in 5 g increments, changing the difference between the masses, but keeping the total constant. Repeat Steps 6 - 7 for each mass combination. Repeat this step until you get at least five different combinations. Part II: Keeping the mass-difference (Δm) constant For this part of the experiment, you will keep the difference in masses between the two sides of the Atwood’s machine constant. The total mass changes. 9. Put 120 g on m 1 and 100 g on m 2 . 10. Repeat Steps 6 – 7 to collect data and determine the acceleration. 11. Add mass in 20 g increments to both sides, keeping a constant difference of 20 g for all trials. Record the resulting mass for each combination in the data table. 12. Repeat Steps 6 - 7 for each combination until you get at least five different combinations. DATA COLLECTION: Part I: Keeping the Total Mass Constant Trial m 1 (g) m 2 (g) Acceleratio n ( m/s 2 ) Δm (g) m T (g) 1 CCD - Physics 211 - Atwood’s Machine 3 of 5