Story #4: What is the displacement of a locomotive that changes its position from 25m [W] to 76m [W]

The displacement of the locomotive is calculated by finding the difference between the final and initial positions, considering direction. Since both positions are west, we can subtract the initial position from the final position:<br /><br />76 m [W] - 25 m [W] = 51 m [W]<br /><br />Therefore, the displacement of the locomotive is $\boxed{51 m [W]}$.<br />