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diketahui :
v polis = 140 km/jam
s = 1,5 km
ditanyakan :
t = ?
jawab :
t = s/v
t = 1,5/140
t = 0,01 jam
4)
diketahui :
vo = 0
a = 12 m/s²
s = 100 m
ditanyakan :
t = ?
jawab :
s = vo t + 1/2 at²
100 = 0 + 1/2 (12) t²
100 = 6t²
16,667 = t²
t = √16,667
t = 4,08 s
5)
diketahui :
vo = 2 m/s
vt = 0,5 m/s
s = 50 m
ditanyakan :
a = ?
jawab :
vt = vo + at
0,5 = 2 + at
at = -1,5
s = vo t + 1/2 at t
50 = 2t + 1/2 (-1,5) t
50 = 2t - 0,75 t
50 = 1,25 t
t = 50/1,25
t = 40 s
at = -1,5
40a = -1,5
a = - 0,0375 m/s²