Position and Motion

1. 1 Position and Motion

2. Displacement is the distance an object moves along a path. • The description of an object’s position depends on the reference point. • 1 • Position and Motion

3. 1 Position and Motion How does the description of an object’s position depend on a reference point? How can you describe the position of an object in two dimensions? What is the difference between distance and displacement?

4. reference point • position • motion • displacement • 1 • Position and Motion

5. 1 Position and Motion Where are you? Look at the photo at the beginning of the lesson. A short time ago, people on this ship probably saw only open ocean. They knew where they were only by looking at the instruments on the ship. But the situation has changed. How can the lighthouse help the ship’s crew guide the ship safely to shore?

6. 1 Position and Motion

7. Displacement is the distance an object moves along a path. 1 Position and Motion Disagree. Displacement is the distance and direction of an object from its starting point.

8. The description of an object’s position depends on the reference point. 1 Position and Motion Agree. Position is described by how far an object is from a reference point.

9. How does the description of an object’s position depend on a reference point? 1 Position and Motion An object’s position is its distance in a certain direction from a reference point.

10. How can you describe the position of an object in two dimensions? 1 Position and Motion The position of an object in two dimensions can be described by choosing a reference point and two reference directions, and then stating the distance along each reference direction.

11. What is the difference between distance and displacement? 1 Position and Motion The distance an object moves is the actual length of its path. Its displacement is the difference its initial position and its final position.