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PHY133 Angular Momentum
PHY133 
Classical Physics
I Laboratory
Conservation of
Angular Momentum
In this experiment, we study torque, moment of inertia, and angular momentum conservation with a
rotating platform.
Equipment
1.
1 rotating platform with photogate,
2.
1 pulley with clamp,
3.
1 iron disk with handle,
4.
1 interface box,
5.
1 computer with timing program,
6.
small masses,
7.
vernier caliper.
Method
Observing the angular acceleration of an object, the rotating platform, under the influence of an external
torque will enable us to measure the moment of inertia of the object using the equation
τ
ext
=
I
α
, where
τ
ext
is the net external torque,
α
is the angular acceleration, and
I
is the moment of inertia. After the
moment of inertia is determined, conservation of angular momentum will be investigated by dropping a
mass onto the rotating platform, and measuring the angular velocity
ϖ
, before (
ϖ
i
) and after (
ϖ
f
) the
"drop." The equation
I
i
ϖ
i
=
I
f
ϖ
f
is an expression of the conservation of angular momentum.
Procedure
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This lab report was uploaded on 02/04/2008 for the course PHY 131 taught by Professor Rijssenbeek during the Fall '03 term at SUNY Stony Brook.
 Fall '03
 Rijssenbeek
 Physics, Angular Momentum, Inertia, Momentum

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