A particle moves along r⃗(t)=⟨0,t,0⟩\vec{r}(t) = \langle 0, t, 0 \rangler(t)=⟨0,t,0⟩. What is its acceleration vector?
⟨0,0,0⟩\langle 0, 0, 0 \rangle⟨0,0,0⟩
⟨0,1,0⟩\langle 0, 1, 0 \rangle⟨0,1,0⟩
⟨1,0,0⟩\langle 1, 0, 0 \rangle⟨1,0,0⟩
⟨0,t,0⟩\langle 0, t, 0 \rangle⟨0,t,0⟩