lab07ws - PHYS 15200 Mechanics IUPUI Physics Department Lab...

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Unformatted text preview: PHYS 15200 Mechanics IUPUI Physics Department Lab 07: Torque Worksheet Name Date Partners DATA TABLES Radius R (m) Diameter d of vertical shaft (m) Radius r of vertical shaft (m) Mass of hanger (kg) Total hanging mass m = Mass of hanger + 0.200 kg = _______________ kg Trial Drop time (s) Height (m) Acceleration (m/s2) 1 2 3 Total hanging mass m = Mass of hanger + 0.500 kg = _______________ kg Trial Drop time (s) Height (m) Acceleration (m/s2) 1 2 3 Lab07: Torque Page 1 of 3 PHYS 15200 Mechanics IUPUI Physics Department Total hanging mass m = Mass of hanger + 0.800 kg = _______________ kg Trial Drop time (s) Height (m) Acceleration (m/s2) 1 2 3 Total hanging mass m = Mass of hanger + 1.100 kg = _______________ kg Trial Drop time (s) Height (m) Acceleration (m/s2) 1 2 3 ANALYSIS 1. Calculate the average acceleration for each different hanging mass. Using the average acceleration, compute the angular acceleration of the vertical shaft and the net torque acting on it due to the tension in the string: Hanging mass m Average acceleration Angular acceleration Net torque (kg) (m/s2) (rad/s2) (N·m) 2. Use Excel to plot the torque along the vertical axis and the angular acceleration along the horizontal axis. Add a trendline and display its equation on the graph. Print the graph and staple to this worksheet before you turn it in. Slope of graph = Measured moment of inertia = Lab07: Torque kg·m2 Page 2 of 3 PHYS 15200 Mechanics IUPUI Physics Department 3. Calculate the total moment of inertia of the two 200-g masses attached to the crossbar. Show your calculations below: We are assuming that the moments of inertia of the vertical shaft and the crossbar are negligible. Is this a reasonable assumption? Explain. 4. Compute the percent error between the moment of inertias obtained in Questions 2 and 3. Take the value found in Question 3 as the accepted value. % error = % Would you say that the two values agree? Explain. Lab07: Torque Page 3 of 3 ...
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