Physics I Lab Manual 2011 60

Physics I Lab Manual 2011 60 - a constant speed. (No forces...

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EXPERIMENT 8. WORK AND ENERGY Practice 1. Consider a pulley of radius 15 mm rotating at an angular velocity of 67 rad/s. What is the linear velocity of a cord moving over the pulley rim without slipping. 2. Given a mass m 1 ± δm 1 and m 2 ± δm 2 moving at speed v ± δv calculate the kinetic energy and its associated uncertainty for the system (i.e. KE ± δ KE). 3. Given a mass m 1 ± δm 1 at a height h ± δh calculate the potential energy and associated uncertainty, i.e. h ± δh . Procedure 1. Make sure the handheld data logger is turned on, the digital rotation sensor is plugged in and the unit is reading an angle. 2. To simulate a frictionless system, tip the track until the cart rolls toward the pulley at
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Unformatted text preview: a constant speed. (No forces should be acting on the cart!) 3. Use vernier calipers to measure r , the radius of the pulley on the rotation sensor which the cord will pass over. 4. Measure and record the mass of the cart, m c . 5. Select a falling mass, m f between 0.05 kg and 0.20 kg. Weigh it together with any mass hanger that you might use to connect it to the end of the string. 6. Place the cart at the starting position, begin recording data on the data logger by pressing and release the cart. 50...
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