1. Speed and Velocity

2. Calculating Speed Speed (S) = distance traveled (d) / the amount of time it took (t). S = d/t

3. Speed Calculating Speed: If you know the distance an object travels in a certain amount of time, you can calculate the speed of the object. Speed = Distance/timeAverage speed = Total distance/Total time What is instantaneous speed? Instantaneous speed is the velocity of an object at a certain time.

4. Average speed Speed is usually NOT CONSTANT Ex. Cars stop and go regularly Runners go slower uphill than downhill Average speed = total distance traveled/total time it took.

5. Calculating Average Speed It took me 1 hour to go 40 km on the highway. Then it took me 2 more hours to go 20 km using the streets. Total Distance: 40 km + 20 km = 60 km Total Time: 1 h + 2 h = 3 hr Ave. Speed: total d/total t = 60 km/3 h = 20 km/h

6. Velocity Velocity – the SPEED and DIRECTION of an object. Example: An airplane moving North at 500 mph A missile moving towards you at 200 m/s

8. Speed v. Velocity 1.How are speed and velocity similar? They both measure how fast something is moving 2. How are speed and velocity different? Velocity includes the direction of motion and speed does not (the car is moving 5mph East)