1. Motion, Speed & Velocity
Chapter 10
Motion, Speed & Velocity

2. Motion, Speed and Velocity
MOTION: an object’s ______________________________________ relative to a ______________________________________

3. Motion, Speed and Velocity
DISTANCE: measures the _________________________________________________
Can be straight or ________________________________
Total amount covered
SI units = _______________________________________
Example: 5 meters (m) A B

4. Motion, Speed and Velocity
DISPLACEMENT: the change in the position of an object
Always indicates a _______________________________
Always in a _____________________________________
Measures only from the _________________________________________ to the ______________________________________________
Example: 5 meters to the east A B

5. Which line is displacement?
Motion, Speed and Velocity
Which line is displacement?
Which line is distance?
END
START

6. THINK!
Give one example of distance and one example of displacement (include units):
Distance:
Displacement:

7. Motion, Speed and Velocity
SPEED: distance traveled divided by the time during which motion occurred.
Need to measure Length & Time
Can’t be _________________________________
Common SI unit: ________________________________________
________________________________________

8. 3 TYPES OF SPEED ___________________________ (speed not changing)
Example: using cruise control
___________________________ (Total distance divided by total time)
Example: the entire trip speed
___________________________ (speed at any given moment)
Example: using a speedometer/radar gun
Main Street PP
Second Street
Front Street W
Route 33

9. Motion, Speed and Velocity
VELOCITY: the speed of an object in a particular direction
Must include the ______________________________ object travels
Example: East, West, North, South, Up, Down, towards the school etc.
Speed = Distance v = d
Time t
_______________________ negative
v = d/t
d = v * t
t = d/v d v t

10. Motion, Speed and Velocity
RESULTANT VELOCITY: ______________________________________ ______________________________ velocities
Example: Boat moving on flowing river, Person walking on airplane, etc.

11. THINK!
How are velocity and speed the same? How are they different (include units)?

12. Velocity Practice Problem #1
Motion, Speed and Velocity
A car heading east travels 180 kilometers (km) in 2 hours. How fast is the car traveling?
d =
t =
v = d v t

13. Velocity Practice Problem #2
Motion, Speed and Velocity
A hockey player skating at 5 m/s during practice, skates for 10,000 seconds. How far did he skate?
d =
t =
v = d v t

14. Velocity Practice Problem #3
Motion, Speed and Velocity
When flying their 500 mile journey for the winter, geese fly at a speed of 25 mph. How long does it take the geese to travel south?
d =
t =
v = d v t

15. Comparisons Distance & Speed _____Direction (Scalar)
___________negative
Displacement & Velocity
________Direction (Vector)___________negative

16. GRAPHING VELOCITY/SPEED x-axis = time
y-axis = displacement (or distance)
slope = velocity/speed
y-axis
faster
slope = velocity = d2 – d1
t2 – t1
d = displacement
t = time
slope = velocity
Example for Top Line
slope = velocity = 100m – 0m
60s – 0s
= 100m
60s
= 1.67m/s
slower
starting point
x-axis

17. COMMON DISPLACEMENT/TIME GRAPH TRENDS
Straight diagonal line up = constant speed away from start
Straight diagonal line down = constant speed toward start
Straight horizontal line = speed equals zero (stopped)
Curved up = acceleration
Sloped down = deceleration

18. Graphs for 2 Runners
Which graph shows one runner starting 10 yards in front of the other runner?
Which graph shows one runner ending 40 yards away from the starting point?
Which graph shows both runners ending at the same place at the same time?

19. Graphs for 2 Runners
Which graph shows both runners moving at the same velocity?
Which graph shows one runner passing the other runner?
Which graph shows that one runner ran a total of 30 yards while the other runner ran a total of 10 yards?