Final answer:
In the context of physics, the correct answer to which of the provided options is a displacement, is '30 km away from New York', as displacement requires a change in position with a specific direction, which this option provides.
Step-by-step explanation:
When discussing displacement, we're talking about the change in position of an object from its initial point to its final point, which is a vector quantity that has both magnitude and direction. The three provided options present different scenarios, but only the one that provides a clear change in position with a specific direction can represent displacement. This would be option C, 30 km away from New York. This is because it signifies a specific change in position from a starting point (New York) in a defined direction (away from it).
Examples of how we define displacement can be seen as follows:
- Displacement is 0 km and distance is 7 km.
- Displacement is 7 km towards the west and distance is 7 km.
- Displacement is a vector quantity because it not only includes the magnitude but also the direction from the starting point to the finishing point.
Therefore, in the context of the following homework question, "Which of the following is displacement?" the correct answer would be '30 km away from New York,' as it encompasses both aspects needed to describe displacement: magnitude and direction.