PHY Lab Work-Kinetic Energy Theorem

NALYSIS 1. Record the moment of inertia / for your rotor: I = 2. Measure with a caliper the diameter of the drum of the rotor and calculate its radius: R = 3. Start with a hanging mass m of about 50 grams. 4. Measure the distance / between the bottom of the mass m and the floor: h = You should make sure that you use the same height h for all your runs. 5. Using the release arm let the mass m fall towards the floor and record the time / it takes to reach it. 6. Repeat this measurement with the same mass at least two more times. 7. Calculate the average time and then use it to calculate the final speed of the mass before it hits the floor. Since this is a motion with constant acceleration the final speed can be calculated using: h = = at2 2h = Up = T (6) vz = 2ah taverage 9. Calculate the corresponding final angular speed of 8. Change the mass m and repeat steps 5 through 7 for 10 different mass values. NOTES: In choosing your mass values: do not exceed a maximum mass of 500 grams. the mass values used should correspond to reasonably evenly spaced W data points. 8. Based on recorded data calculate the mechanical work W done by the gravitational force and the change in the kinetic energy AKE. 9. Plot AKE vs W. Question 2: Calculate the slope for your experimental AKE vs W graph and discuss the consistency of the measured value with the work-kinetic energy theorem. Discuss possible sources of error in the experiment