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I1 * ω1 + I2 * ω2 = I1*ω1' + I2*ω2'
10*3 + 5*0 = 10*ω' + 5*ω'
15*ω' = 30
ω' = 2 rad/s
jawaban B
Nomor 10
T = m*(g - a)
cari a lebih dulu
a = m beban * gravitasi / (m beban + inersia katrol / kuadrat jari-jari)
a = 0,4*10 / (0,4 + 4*10⁻³ / 0,1²) = 4/(0,4 + 0,4) = 5 m/s²
Dan T sudah dapat dihitung
T = 0,4 * (10 - 5) = 2 Newton