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= 4 × 340.000 = 4 × 4200 × 10
= 1.360.000 J = 168.000 J
(iii) Qbc + Qcd = Qbd
=1.360.000 + 168.000
= 1.528.000
5. V4 = 108 + 36
= 144 Km / jam
Jika T = 4 menit maka T = 4/60 jam
S = V × T
=
= 9,6 km
6. Jarak = AB + BC = 100 + 30 = 130 m
Perpindahan = AB - BC = 100 - 30 = 70 m