stopping distance teacher: chelsea hoglund summer institute 2011
Post on 21-Dec-2015
218 views
TRANSCRIPT
Stopping Distance
Teacher: Chelsea HoglundSummer Institute 2011
•DEMONSTRATION OF STOPPING DISTANCES
SPEED REACTION DISTANCE
BRAKING DISTANCE
TOTAL DISTANCE
•WHAT DID YOU NOTICE?
Reaction Distance
Braking Distance
Total Distance = Reaction Distance + Braking Distance
•NEW VOCABULARY
TERMS??
FORMULA TO CALCULATE STOPPING DISTANCE
• Reaction DistanceR =3.675V
B =V2
10.43
Assuming Reaction Time is 2.5 Seconds
Assuming grade is 0%
•Total Distance = R + B
• Braking DistanceV = Velocity
V = Velocity
• SCENARIO 1:
If you are driving 34 mph and see a cat in the road 200 feet ahead will you stop in time to avoid hitting the cat?
• SCENARIO 2:
You are driving 48 mph and see a mother duck and her ducklings crossing the road 550 feet ahead. If you stop now, will you be able to stop in time to avoid hitting them?
CHALLENGE:
You stopped your car in 500 feet, how fast were you going?