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α = 12t + 4.
ω₀ = 3 rad/s
Dit : r = ..? t = 1s
Peny :
r = ω₀ + ∫a dt
= 3 + ∫12t + 4 dt
= 3 + (6t² + 4t)
t = 1s
r = 3 + (6t² + 4t)
= 3 + (6(1)² + 4(1))
= 3 + 6 + 4
= 13 rad/s