Diketahui:
Penyelesaian
Percepatan A
Vta = v0a + at
20 = 30 + a5
a5 = 20-30
a = [tex]-\frac{10}{5}[/tex] = -2m/s
yang berarti mengalami perlambatan karena nilainya (-)
Rumus jarak = s = v x t
Jadi,
sA = sB
voA . t + [tex]\frac{1}{2} a_{A} t^{2}[/tex] = vB . t
30.t + [tex]\frac{1}{2} . (-2) t^{2}[/tex] = 20t
30t + [tex](-2) t^{2}[/tex]= 20t
30t - 20t = [tex]2t^{2}[/tex]
[tex]2t^{2}[/tex] = 30t - 20t
t = 30 - 20 = 10s
Jawabannya adalah B. 10
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Verified answer
Diketahui:
Penyelesaian
Percepatan A
Vta = v0a + at
20 = 30 + a5
a5 = 20-30
a = [tex]-\frac{10}{5}[/tex] = -2m/s
yang berarti mengalami perlambatan karena nilainya (-)
Rumus jarak = s = v x t
Jadi,
sA = sB
voA . t + [tex]\frac{1}{2} a_{A} t^{2}[/tex] = vB . t
30.t + [tex]\frac{1}{2} . (-2) t^{2}[/tex] = 20t
30t + [tex](-2) t^{2}[/tex]= 20t
30t - 20t = [tex]2t^{2}[/tex]
[tex]2t^{2}[/tex] = 30t - 20t
t = 30 - 20 = 10s
Jawabannya adalah B. 10