# What is the speed of an object that travels from ( -2, -5, 1 )  to ( -1,4,3 )  over 2 s?

Mar 14, 2018

Speed = Distance/Time $\Rightarrow S = \frac{d}{t}$

#### Explanation:

Here the distance between the two points is

$d = \sqrt{{\left(- 2 + 1\right)}^{2} + {\left(- 5 - 4\right)}^{2} + {\left(1 - 3\right)}^{2}}$ units

$\Rightarrow d = \sqrt{1 + 81 + 4}$units

$\Rightarrow d = 9.27$ units

$\therefore S = \frac{d}{t}$

$\Rightarrow S = \frac{9.27}{2}$= $4.635$ units$/ s$