Physics Lab 5

# Physics Lab 5 - Lab 5: Uniform Circular Motion Elliot Blau...

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Lab 5: Uniform Circular Motion Elliot Blau Lab Partner: Taylor Gammons 3/4/2008 TA: Zheng Ren Section 434, 4:00-5:30PM Pledge: I pledge that no unauthorized assistance has been given or received in the completion of the work presented in this report. ________________________

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Abstract: In this experiment, the kinematics and dynamics of uniform circular motion were observed. This was done by measuring the period of an object undergoing uniform circular motion with a fixed radius, and different values of net force (different static masses). A variable-speed rotating platform was used in order to rotate the mass and a photogate, in conjunction with a smart-timer, was utilized in order to measure the period of rotation for each static mass added to the apparatus. Using the average period time for each static mass, the angular speed was calculated for each using the equation 2π / T. Using the 5 different average times for each static mass, a plot of angular speed squared vs. force was constructed and used in order to find the mass of the rotating mass. By taking the slope of the linear regression of this plot, and solving the equation, w 2 = F / (mr), for m, the mass, the value of the mass of the rotating mass was experimentally calculated at 0.2036kg. This value was in agreement with the actual mass of the rotating mass which was measured at 0.2079kg, leaving a 2.07% error.
Data Analysis: Trial Period (s) 1 1.5519 2 1.5508 3 1.5489 4 1.5443 5 1.5392 6 1.5294 7 1.5279 8 1.5403 9 1.5509 10 1.5570 Average 1.5441 Average Stopwatch Time 1.59 Standard Deviation 9.766x10 -3 Standard Error 3.255x10 -3 Table 1: Data obtained using a static mass of 55.0g Trial Period (s) 1 2.6011 2 2.6291 3 2.6450 4 2.6645 5 2.7212 6 2.7433 7 2.7261 8 2.7022 9 2.6705 10 2.6630 Average 2.6766 Average Stopwatch Time 2.65 Standard Deviation 4.579x10 -2 Standard Error 1.526x10 -3 Table 2: Data obtained using a static mass of 25.0g

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## This note was uploaded on 03/27/2008 for the course PHYS 104 taught by Professor Pengyi during the Spring '08 term at UNC.

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Physics Lab 5 - Lab 5: Uniform Circular Motion Elliot Blau...

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