2-21 할리데이 11판 솔루션 일반물리학

$$ \begin{aligned} \Ans&=\Delta x\\ &=\int_0^{16}v\dd t\\ &=\frac{1}{2}\cdot2\cdot12+8\cdot12+\frac{1}{2}\cdot(6+12)\cdot2+4\cdot6\\ &=150\ut{m} \end{aligned} $$