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Ket
1 Km = 1000 m
maka
s = 200 km = 200000 m
t = 20 s
a = 20 m/s
Vo = ?
Vt =?
s = Vo + 1/2 .a.t^2
200.000 = Vo .t + 1/2. 20 .20^2
200.000 = Vo. 20 + 1/2.20.400
200,000 = 20 .Vo + 4000
Vo = (200.000 - 4000) / 20
Vo = 9800 m/s
Vt = Vo + a .t
Vt = 9800 + 20.20
Vt = 9800 + 400
Vt = 10200 m/s
Ket
Vt = kecepatan terakhir
Vo = Kecepatan awal
a = perceptan
s = jarak
t = waktu
semoga membatu