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m = 1,5 ton = 1500 kg
v = 72 km/jam = 20 m/s
F = 2,4 x 10⁴ = 24000 N
Ditanya :
S rem sampai berhenti ,
Penyelesaian :
Cari "a" terlebih dahulu !
F = m a
a = F/m
a = 24000/1500
a = 16 m/s²
Kemudian, kita mencari "t"
a = v/t
t = v/a
t = 20/16
t = 1,25 Sekon
Kemudian barulah mencari S, dari di Rem hingga Berhenti :,
S = V₀.t + ¹/₂ a t²
S = 0(1,25) + ¹/₂ (16) (1.25)²
S = 0 + 8 (1,5625)
S = 12,5 Meter