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= -10 . 1 - 25(4/5) . 2
= -10 - 40
= -50 berlawanan jarum jam (d)
9. I = m₁r₁² + m₂r₂²
= 0,4.(0,15)² + 0,2(0,1)²
= 9x +
= = 1,1x (d)