- #1

Alpha123

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## Homework Statement

Particle X moves with a velocity of 15 m/s[R]. Particle Y moves with a velocity of 5.0 m/s[L]. What is the velocity of particle X with reference to particle Y? The correct answer is 20 m/s (R).

I do not understand what velocity in reference to particle Y means, and how to find it.

## Homework Equations

d= (vi)t + 1/2 at^2

(vf)^2= (vi)^2 + 2ad

vf= vi + at

a=(vi+vf)/2 X t

## The Attempt at a Solution

I have drawn the vectors ( not sure if correctly done), but i do not know what my next step is.

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