What is the speed of an object that travels from $(9,-6,1)$ to $(-1,3,-8)$ over $4 s$ ?

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Answer 1 · 2016-01-06T17:09:19

$3.63"units/s"$

The distance between the 2 points located in 3 space is given by:

$d=sqrt([9-(-1)]^2+[-6+3]^2+[1-(-8)]^2)$

$:.d=sqrt(11^2+3^2+9^2)$

$d=sqrt(211)=14.52"units"$

$v=d/t=14.52/4=3.63"units/s"$

What is the speed of an object that travels from (9,-6,1) (9,-6,1) to (-1,3,-8) (-1,3,-8) over 4 s4 s?