Question

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

Answer 1

`3.63"units/s"`

Explanation:

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"`