# What is the speed of an object that travels from ( -4,6,1)  to ( -1,4,-2 )  over 2 s?

$d = \sqrt{\Delta {X}^{2} + \Delta {Y}^{2} + \Delta {z}^{2}} = \sqrt{{3}^{2} + {\left(- 2\right)}^{2} + {\left(- 3\right)}^{2}} = \sqrt{22} = 4 , 7 m$
$v = \frac{\delta s}{\delta t} = \frac{4 , 7 m}{2 s} = 2 , 35 \frac{m}{s}$