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a . perubahan v benda dari t0 sampai t2
(2.2i + 3.2j +4k) - (0i +0j +0k ) = 4i + 6k + 4k
b. percepatan a rata-rata =V2 - V0/ t2-t0 = (4i +6j +4k)/2 = 2i+ 3j +2k
c. posisi adalah integral dari V
S(t) = ∫ (2ti + 3tj +4k)
=1/2 t²i + 3/2 t²j + 4tk
S(2) = 1/2 (2)²i + 3/2 (2)²j + 4(2)k
= 2i + 6j +8k
d. kecepatan rata-rata Vrata-rata
Vr = ΔS/Δt
=S2 - S0/ 2-0 = (2i + 6j + 8k) -(0)/2 = i+3j +4k