Question

What is the speed of an object that travels from `( -5 , 2, 3 )` to `(6 , 0, 7 )` over `4 s`?

Answer 1

`v~=2,97m/s`

Explanation:

`"Distance between two point is equal to :"`
`s=sqrt (Delta x^2+Delta y^2+Delta z^2)`
`s=sqrt(11²+(-2)^2+4^2)`
`s=sqrt (121+4+16)`
`s=sqrt 141=11,87m`
`v=s/t`
`v=(11,87)/4`
`v~=2,97m/s`