A person of mass $60\ \text{kg}$ stands on a weighing scale (marked in kg) in a lift. The lift starts from rest and goes down: first it speeds up at $2\ \text{m/s}^2$, then it moves at a steady speed, and finally it slows down at $2\ \text{m/s}^2$ before stopping. Taking $g = 10\ \text{m/s}^2$, the scale reads, in these three stages,