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apa satuan panjang dalam persamaan ?
Anggap meter
X = - 3t^3 - 4t
Vx = - 9t^2 - 4
ax = - 18t
saat t = 5 s, ax = -18 (5) = - 90 m/s²
Y = -5t^2 + 6
Vy = -10t
ay = - 10 m/s
Percepatan yang dialami saat t = 5 s
a = -90 i - 10 j
besar perceaptan
|a| = √[ (-90)² + (-10)² ] = √8200 ≈ 90,55 m/s² ←