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= 2/5.1.20^2
= 2/5 x 400
= 160 kg m^2
semoga jwbannya bnar..
R = 20 cm = 0,2 m
bola pejal = 2/5
Dit i ?
jawab.
momen inersia pada pusat massa
i = 2/5 mR^2
= 2/5 . 1 . (0,2)^2
= 2/5 . 1 . 0,04
= 0,016 kgm^2
pada ujung sumbu putar
i = lcm . m . l^2
= 0, 016 . 1 . (0,2)^2
= 0,00064 kgm^2