1. Speed & Velocity

2. Speed, Velocity and Acceleration
Speed, velocity and acceleration describe how an object’s position and motion change through time.
Rates measure change in something over a length of time.

3. A measure of the distance an object travels per unit of time.
What is speed?
A measure of the distance an object travels per unit of time.

4. How could we increase an objects speed?
Move 5 meters in 5 seconds
Move 5 meters in 2 seconds
Move 3 seconds for a distance of 3 meters
Move 3 seconds for a distance of 7 meters

5. To increase an object’s speed
Increase distance (d) the object travels in the same time (t). Or
Decrease the time (t) it takes for an object to travel the same distance (d).

6. Speed (S) = distance object travels time it takes to travel distance
Calculating Speed
Speed (S) = distance object travels time it takes to travel distance
S= d t
Measuring
Unit
Abbreviation
Distance
meter m
kilometer km
Time
seconds s
hours hr

7. Calculating Speed
If you know any two of the variables, you can calculate the missing variable.

8. STEPS TO COMPLETING A FORMULA
Write the formula
Plug in the info you are given
Solve the equation
Make sure to include your units in your answer (meters, seconds, etc.)

9. PRACTICE
Calculate the speed of a car going 80 meters in 20 seconds.

10. PRACTICE
Requel runs 25 meters in 10 seconds. What is her speed?