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Verified answer
Diket :Vo = 15m/s
a = 2m/s
s = 100m
Ditanya :
t = ...?
Jawab :
S = Vot+1/2at^2
100 = 15t + 1/2(2)(t)^2
t^2+15t+100 = 0
(t+20)(t-5) = 0
t = -20 detik (tidak mungkin karena waktu tidak mungkin negatif)
t = 5 detik
Mari kita melakukan pembuktian :
S = Vot+1/2at^2
S = 15(5)+1/2(2)(5)^2
S = 75+25
S = 100m
Maka, waktu yg di perlukan adalah 5 detik