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Vt = 144km/j = 40m/w
S = 30m
dit = a?
jawab =
vt^2 = vo^2 + 2as
40^2 = 10^2 + 2a.30
1600 = 100 + 60a
1500 = 60a
a=1500/60
= 25 m/s^2