1. Distance, Displacement & Speed

2. Distance
The length two points

3. Measuring Distance
The SI unit for measuring distance is the meter (m).
For very large distances, it is more common to make measurements in kilometers (km).
Distances that are smaller than a meter are measured in centimeters (cm).

4. Displacement
Direction from the starting point and the length of a straight line from the starting point to the ending point.

5. Speed
-The ratio of the distance an object moves to the amount of time the object moves.
-The SI unit of speed is meters per second (m/s).
-Two ways to express the speed of an object are average speed and instantaneous speed.

6. Formula used to Calculate Speed
Speed (m/s)=distance (m) time (s) S=d t

7. Average Speed
The total distance traveled, d, divided by the time, t, it takes to travel that distance.

8. Instantaneous Speed
The rate at which an object is moving at a given moment in time.
The speedometer in a car measures the car’s instantaneous speed.

9. Graphing Motion
Speed can also be determined by looking at a distance-time graph.
The slope of a line on a distance-time graph is the speed of the object.
Slope is the change in the vertical axis value divided by the change in the horizontal axis value.
Steeper slope means faster speed.

10. Distance-Time Graphs

11. Distance-Time Graphs

12. Distance-Time Graphs

13. Velocity
Velocity is a description of BOTH speed and direction of motion.
The unit for velocity is meters per second (m/s).