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I = 1/12 mr² = 1/12 x 2 x 0,2² = 1/150 kgm²
momen inersia lempeng 2:
I = 1/12 mr² = 1/12 x 2 x 0,4² = 2/75 kgm²
I1ω1 = I2ω2
ω1/ω2 = I2/I1 = (2/75)/(1/150) = 4
berarti perbandingan kecepatan sudutnya adalah 4:1