3. 5 meters in 1 second: 5 m/sec 10 meters in 2 seconds: 5 m/sec 20 meters in 10 seconds: 2 m/sec Biking Speeds:

4. Velocity: Speed with direction Biking at 2 m/sec to the north Flying at 120 mph to the SW

5. Velocity: Speed with direction An airplane travels 250 km due north in 1/2 hour. Speed? 500 km/hr Velocity? 500 km/hr north

6. Vocabulary: Vector vs. Scalar Vector: Has a size (magnitude) AND a direction Example – Velocity Scalar: Has a size (magnitude) Example - Speed

8. Velocity: Slope of position vs. time graph

9. Instantaneous vs. Average

10. Drive to Seattle Instantaneous speeds: 31 mph on Cemetery Road 18 mph slowing down for a traffic light 57 mph on I-405 42 mph on I-90 Average speed: 20 miles in ½ hour = 40 mph Instantaneous vs. Average