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Vehicle Collision Physics

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by

mitchell sandey

on 25 February 2014

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Transcript of Vehicle Collision Physics

Weight=13600 N
Max. Accel. = 3 m/s2
Mass=3200 kg
Friction Coefficient=.76
The story so far...
This ought to be a "smashing" problem!
Car(McInerney)
Truck(Lang)
Weight=69700 N
Mass=7110 kg
Accident Reconstruction
Miss Lang, a truck driver, collided with Mr. McInerney, who drove a car. Niether claim responsibility for the accident. Instead, each has issued a statement, making claims about how the accident happened.
Known
Known
Info based on alleged story
Velocity= 8.83 m/s at time of crash
Claims
To have made a full stop
Truck did not brake
Claims
To have been braking
Car did not stop
Info based on alleged story
Velocity(braking)= 6.7 m/s
Vehicle Collision Physics
The Calculations!
And now...
Given Info
Force(Normal)=130 N
Force=100 N
Weight(Car)=13600 N
Weight(Truck)=69700 N
Skid Distance(Car)=8.2 m
Skid Distance(Truck)=11 m
Claims
McInerney(car) claims:
To have made a full stop
Lang was not braking
Lang(truck) claims:
To have been braking
McInerney did not stop
Who is at fault? Who is telling the truth?
Additional Details provided:
Mr. McInerney, traveling North, had a flashing red light
Ms. Lang, traveling West, had a flashing yellow light
The distance from stoplight to collision point for the car is 13 m
Coefficient of Kinetic Friction of each vehicle
Speed of each vehicle after the collision
Speed of each vehicle just before collision

So we'll need...
Pre-crash
Mid-crash
Post-crash
BUSTED
Remember:
had a flashing red light

had a flashing yellow light
Determine who, if anybody, is telling truth
Object of the game
USING PHYSICS!! :)
90°
BUSTED
Friction
Acceleration
Velocity
Momentum
Vector Addition
To do that we'll need some physics concepts...
Proof
Car
Truck
Full transcript