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Δt = 3 s
a = 4 m/s²
vt = ...?
a = Δv ÷ Δt
4 = ( vt - 20 ) ÷ 3
4 × 3 = vt - 20
12 = vt - 20
vt = 20 + 12
vt = 32
Jika kecepatan akhir 32 m/s
Paka perubahan kecepatan adalah = vt - vo = 32 - 20 = 12