Question about inertia of wheel . Assuming the mass of the disk is 2.2 Kg, how w

Question

Question about inertia of wheel.

Assuming the mass of the disk is 2.2 Kg, how would I find the rotational inertia of the wheel? I thought I just use the formula .5mr^2, but that's not working. Why? How would I approach this problem? I will definitely give best answer. Thanks.

Question about inertia of wheel. Assuming the mass of the disk is 2.2 Kg, how would I find the rotational inertia of the wheel? I thought I just use the formula .5mr^2, but that's not working. Why? How would I approach this problem? I will definitely give best answer. Thanks.

Explanation / Answer

moment of inertia wheel without spokes is

=mR2

with spokes

=mR2/3

I=2.2*0.16

=0.352kg-m2

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