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Lab 120

# Lab 120 - Lab 120 Conservation of Angular Momentum Group 1...

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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 ( [email protected] ) 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.
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Lab 120 - Lab 120 Conservation of Angular Momentum Group 1...

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