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r1 (0,0)
t = 1 jam
dalam bentuk vektor
r = 100 i + 50 j
Δ=r2-r1
=(100i+50j) - (0i+0j)
=100i + 50j
V = (Δx/Δt) i + (Δy/Δt) j = (100/1)i + (50/1)j = (100 i + 50 j) km/jam
|r| = √xi² + yj²
=√100²+50²
=√12500
=√625x2
=25√2 km
v = Δr/Δt = 25√2 / 1 = 25√2 km/jam