Question

What is the speed of an object that travels from `( -2, -5, 1 )` to `( -1,4,3 )` over `2 s`?

Answer 1

Speed = Distance/Time `rArr S = d/t`

Explanation:

Here the distance between the two points is

`d = sqrt((-2+1)^2+(-5-4)^2+(1-3)^2)` units

`rArr d = sqrt(1+81+4)`units

`rArr d =9.27` units

`:. S = d/t`

`rArr S = 9.27/2`= `4.635` units`/s`