# What is the speed of an object that travels from (9,-6,1)  to (-1,3,-8)  over 6 s?

Feb 20, 2016

$v = 2 , 298 \frac{m}{s}$

#### Explanation:

$\text{distance between two point :} \Delta x = \sqrt{{\left(- 1 - 9\right)}^{2} + {\left(3 + 6\right)}^{2} + {\left(- 8 - 1\right)}^{2}}$
$\Delta x = \sqrt{100 + 81 + 81} = \sqrt{262}$
$\Delta x \cong 16 , 19 m$
$v = \frac{\Delta x}{t}$
$v = \frac{16 , 19}{6}$
$v = 2 , 298 \frac{m}{s}$