Lab 120 - Lab 120 Conservation of Angular Momentum 11/22/06...

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Lab 120 – Conservation of Angular Momentum 11/22/06 Group 1: Russell Adams Pawel Bokota Vahid Hamidullah Mike Makhlouf Physics 111A TA: Ke Su ( ks265@njit.edu ) 1. - Objective To demonstrate that angular momentum is conserved in inelastic collisions. 2. – Theory The angular momentum of a mass m with velocity v about an axis A-A’ is given by: L m = pd = mvd where d is the perpendicular distance from the axis to the line of action of the vector mv . The angular momentum L of a body with a rotational inertia I rotating with an angular velocity ώ about axis A-A’ is given by: L A-A’ = Iώ After the ball rolls down the ramp it is caught in the ball-catch in an inelastic collision. When the ball is caught in a ball-catch, the ball, ball-catch, small pulley disk and large aluminum disk rotate about the central axis. You are to prove that the total angular momentum L of the system is constant and doesn’t change when a collision occurs inside the system. The ball catch is secured to the aluminum disk, and the final angular momentum is that of a ball- catch, the ball, small pulley disk and large aluminum disk. 3. – Equipment The apparatus of the experiment is illustrated as follows.
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4. - Procedure 1. The mass of the ball, ball catch, top disk and pulley were massed and recorded. 2. The diameter of the top disk and pulley were also measured and recorded, as well as
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This note was uploaded on 04/18/2010 for the course PHYS 111A taught by Professor Universal during the Spring '10 term at NJIT.

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Lab 120 - Lab 120 Conservation of Angular Momentum 11/22/06...

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