Scalars and Vectors in One Dimension Practice Test

Along a line, up is positive and down is negative. An elevator moves from $y=+2,\text{m}$ to $y=-4,\text{m}$ in $3,\text{s}$. Which statement about average velocity and average speed is correct?

A runner moves along a line where north is positive and south is negative. During one interval, the runner’s velocity is $-3,\text{m/s}$. Which quantity must be negative in this situation?