Answer 7_1_4

For the circular disc

I = [2.5 kg x (0.2 m)² ] ÷ 2 =  0.05 kg m²

For the hollow cylinder:

I = 0.1 kg m² (why?)

For the solid sphere:

I = [2 x 2.5 kg x (0.2 m)² ] ÷ 5 = 0.04 kg m²

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