Speed:
the distance an object
travels per unit of time
Speed = distance / time
Average speed = total distance / total time
Solve: A whitetail deer runs 33 meters in 3 seconds.
What is its speed?
How does this boat
show speed?
Velocity
This occurs when you know both the
speed and direction of an object’s
motion.
In other words: Speed in a given
direction.
Example 25 km/h eastward
Velocity
Acceleration
The change in velocity/speed per unit of
time
Three conditions:
Increase in speed
Decrease in speed
Change in direction
Formula: Final Velocity - Initial Velocity / Time
Acceleration
Units of Measurement
Time - s or h
Distance -cm, m, km
Speed - m/s, km/h
Velocity - m/s Northeast
Acceleration - m/s/s
Sample problems:
A family takes a trip. They travel for an
hour at 50 km/h and then for two hours at
25 km/h. What is their average speed?
Mike’s skateboard accelerates from 0 m/s
to 48 m/s in 6 seconds. What is his rate
of acceleration?