Question

Objects A and B are at the origin. If object A moves to `(3 ,-4 )` and object B moves to `(2 ,-6 )` over `4 s`, what is the relative velocity of object B from the perspective of object A?

Answer 1

`"watch over the animation"`
`v_"AB"=sqrt5/4 " unit/s"`

Explanation:

`"displacement for the object of A and B:"`
`Delta s=sqrt(2^2+1^2)`
`Delta s=sqrt5`
`v_"AB"=(Delta s)/(Delta t)`
`v_"AB"=sqrt5/4 " unit/s"`