11_21_Torque_Accel

11_21_Torque_Accel - Determine the acceleration directions...

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Physics 211 11/21 HW Handout Name______________________ Fall 2002 Torque with Acceleration Due Monday 11/25 1) Consider the pulley, disk, and mass system shown at right. The two masses are equal but the strings are wrapped around different radii pulleys. The system is held stationary by the hand. a) How do the tensions, T 1 and T 2 compare to each other? Explain. b) The hand applies a torque to the disk that keeps it from turning. Which direction (CW or CCW) does this torque point? Explain. 2) Now the hand is removed and the system is free to accelerate. (Hint: For all of the questions below, draw free body diagrams.) a)
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Unformatted text preview: Determine the acceleration directions (if any) for the disk and both masses. Explain. b) How do the tensions, T 1 and T 2 compare to each other now? Explain. c) How does the tension, T 1 , change, if at all, when the hand is removed? Explain. d) How does the tension, T 2 , change, if at all, when the hand is removed? Explain. e) What is wrong with the following students reasoning? The clockwise torque is greater than the counterclockwise torque because the disk is accelerating clockwise. For this to happen, T 2 must pull harder on the disk than T 1 . T 2 T 1 m m T 2 T 1 m m...
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