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Verified answer
Vo = 72 km/jam = 72000/3600 = 20 m/sVt = 0
s = 8 meter
ditanyakan -a atau perlambatan ?
Vt² = Vo² + 2 a s
0² = 20² + 2 . a . 8
-400 = 16a
a = -400/16
a = -25 m/s²
besar perlambatannya adalah 25 m/s²