Matt Idleman
In today’s lab, the question we were trying to answer was if angular momentum is
conserved in a system.
My prediction was that the angular system would indeed be conserved,
meaning the angular momentum of this system before the addition of the ring would be equal to
the angular momentum of the system after the addition of the ring.
I predicted this because
angular momentum is known to be conserved in a system as long as there is no external force or
external torque acting on the system.
For our group’s procedure, we first found the mass of the disk and the ring.
We then set
up the disk and gave it a spin to get it rotating.
While it was rotating we found the angular
velocity by finding the time it took for the disk to rotate ten times and plugging it into the
formula given to us in class.
We then used that information to find the angular momentum of the
disk by multiplying the angular velocity by the moment of inertia.
Next, we took the ring and
gently set it down on the disk while it was still spinning.
Again we found the time it took for the
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 Spring '09
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 Angular Momentum, 15%, 2%, 22%, Matt Idleman

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