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r = 30cm = 0,3m
w = 300 putaran/menit
dit : momentum inersia(I) & energi kinetik (EKr)
jawab :
I = 1/2 mr²
= 1/2 6.(0,3)²
= 0,27 kg m²
EKr = 1/2 IW²
= 1/2 0,27.300
= 40,5
maaf kalau salah:)