physics- homework help?

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harajukuxlover

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Assume the following parameters:
Mass of the bottom steel disc : 1.47 kg
mass of the upper steel disc: 1.48 kg
radius of each disc: 63.3
radius of the take up spool: r = 1.25 cm
mass of the falling weight: 25 grams

Using the values given :
calculate the following
a) the moment of inertia of the lower disc, steel disc
b) the moment of inertia of the upper, steel disc
c) the moment of inertia of the upper, aluminum disc
d) the combined moment of inertia of the two steel discs
 
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