tolong bantu dong. besok dikumpul. nomer 8,9 ya. sama caranya

Nomor 8
EM₂ = EM₁
        = EP₁ + EK₁
        = mgh₁ + 1/2 mv₁²
        = (0,25 kg)[(9,8 m/s²)(1,2 m) + 1/2 (1 m/s)²] = 3,065 J

Nomor 9
EMA = EMB
EPA + EKA = EPB + EKB
mghA + 1/2 mvA² = mghB + 1/2 mvB²
(10 m/s²)(2 m) + 1/2 (10 m/s)² = (10 m/s²)hB + 1/2 (2 m/s)²
hB = 6,8 m