1. Ch. 11 Sec. 1 Distance & Displacement

2. Frame of Reference Describing motion accurately requires a Frame of Reference Describing motion accurately requires a Frame of Reference Object that is not moving with respect to one another Object that is not moving with respect to one another Relative Motion: Relative Motion: Movement in relation to a frame of reference Movement in relation to a frame of reference

3. Distance How far an object has moved How far an object has moved Length of a path between two points Length of a path between two points SI Unit: meter (m) SI Unit: meter (m) km for long distances km for long distances cm for short distances cm for short distances

4. Displacement distance & direction of an object's change in position from the starting point. distance & direction of an object's change in position from the starting point.

5. A person walks 14 m west, 2 meters east, 5 meters west and 10 meters east. A person walks 14 m west, 2 meters east, 5 meters west and 10 meters east. What is distance? What is distance? 31 meters 31 meters What is displacement What is displacement 7 meters west 7 meters west

6. Displacement Vector: Vector: Quantity w/ magnitude and direction Quantity w/ magnitude and direction Magnitude can be size, length, or amount Magnitude can be size, length, or amount Vector addition Vector addition Vector addition Vector addition The addition of vectors is the resultant vector The addition of vectors is the resultant vector