Question

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

Answer 1

`v=2,298 m/s`

Explanation:

`"distance between two point :"Delta x=sqrt((-1-9)^2+(3+6)^2+(-8-1)^2)`
`Delta x=sqrt(100+81+81)=sqrt 262`
`Delta x~=16,19m`
`v=(Delta x)/t`
`v=(16,19)/6`
`v=2,298 m/s`