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g = 9,8 m/s2
ditanya= y max ?
jawab =
y max = v0 kuadrat / 2 . g
= 30 kuadrat / 2.9,8
= 900 / 19,6 = 45,9 m
h(t) = Vo.t - 1/2 gt²
= 30t - 1/2.10.t²
= 30t - 5t²
a= -5
b= 30
c=0
h(t) max saat t puncak,
t puncak saat simetris = -b/2a =-30/2(-5) = 3s
h(3) = 30.(3) - 5. 3²
= 90- 45
= 45 m
atau :
turunan h(t) --> akan didapat V(t)
V(t) = dh(t)/dt
= 30 - 10t
t puncak saat V di ketinggian max = 0
0 = 30-10t
10t = 30
t = 3s --> h (3) --> sama spt diatas
atau :
h max = Vo²/2g
= 30² /2.10
= 900/20
= 45 m
atau
h max =
D = 900
h max =