Lab 119

# Lab 119 - Lab 119 Heavy Pulley Atwoods Machine Group 1...

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Lab 119 – Heavy Pulley Atwood’s Machine 11/17/06 Group 1: Russell Adams Pawel Bokota Vahid Hamidullah Mike Makhlouf Physics 111A TA: Ke Su ( ) 1. - Objective To observe the effect of a heavy pulley on the operation of an Atwood’s machine. 2. – Theory The moment of inertia of a cylinder about an axis through its center, AA is I= ½(m)r 2 . The heavy pulley in the Atwood’s machine is composed of 5 cylinders with a common axis. The (total) rotational inertia for the pulley is the sum of the rotational inertias for the five cylinders. An Atwood’s machine consists of light flexable cord passing over a pulley with masses M and M+m hung on either end of the cord. 3. – Equipment The apparatus of the experiment is illustrated as follows.

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4. - Procedure 1. Apply Newton’s Second Law for linear motion and angular motion, to the FBD’s shown and solve for acceleration a . note that four equations are necessary (a friction force must be included) 2. With both masses M equal to 600 grams, add small masses m
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Lab 119 - Lab 119 Heavy Pulley Atwoods Machine Group 1...

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