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m = 1221 kg
Vo = 111 km/jam
Vt = 0 berhenti
S = 49 m = 49×10⁻³ km
F = ___ ?
Gaya
W = ΔEk
F S = ¹/₂ m (Vt² - Vo²)
F · 49×10⁻³ = ¹/₂ · 1221 · (0 - 111²)
F = - ¹/₂ · 1221 · 111² / 49×10⁻³
F = -153509602,041 N ← jwb