## Physics (10th Edition)

a) +8.0 m/s b) -8.0 m/s c) +2.0 $\times$ $10^{1}$ m/s
displacement = $\Delta$x = $x_{f}$ - $x_{0}$ average velocity = $\frac{displacement}{time}$ a) $\Delta$x = 6 - 2 = 4 average velocity = $\frac{4}{0.50}$ = +8.0 m/s b) $\Delta$x = 2 - 6 = -4 average velocity = $\frac{-4}{0.50}$ = -8.0 m/s c) $\Delta$x = 7 - (-3) = 10 average velocity = $\frac{10}{0.50}$ = +2.0 $\times$ $10^{1}$ m/s