Transcript Read E-45 Activity 83 Title: Coming to a Stop Problem: How does a car’s stopping distance change in different situations? Hypothesis: If _____________, then ______________________.

Read E-45
Activity 83
Title: Coming to a Stop
Problem: How does a car’s stopping
distance change in different situations?
Hypothesis: If _____________, then
______________________.
Imagine you are driving down a
road and see a tree lying across the
road. What factors do you think
affect whether you will be able to
stop before you hit the tree?
• 5 Categories
-Car Speed
-Distance from the Tree
-Condition of the driver
-Vehicle Equipment
-Road Conditions
Background Information:
• Braking Distance is the distance it takes
for the car to stop once the brakes have
been applied.
• Reaction Time is the time period between
the driver’s realization that there is danger
ahead and his or her engaging the brakes.
• Stopping Distance is the distance it takes
a driver to stop a car. It is the sum of the
reaction distance and the braking
distance.
Background Information (continued):
Reaction distance = initial x reaction
speed
time
reaction
braking
Stopping distance =
+
distance distance
Which of your “stopping factors” affect
the reaction distance and which affect
braking distance?
•
•
•
•
Reaction Distance
Condition of Driver
Car Speed
Vehicle equipment
•
•
•
•
Braking Distance
Car Speed
Road Conditions
Vehicle Equipment
The driver is in direct control of two critical factors—
car speed and alertness
Graphing
1.
2.
3.
4.
5.
6.
Give the graph a title
Use as much of the axis as possible
Label axes, including units
Color Code Key
Plot Points
Best Fit Curve (DO NOT CONNECT
THE DOTS WITH A STRAIGHT LINE!!!!)
Best Fit Curve