There are 10 cars in a row, all moving in the the same direction with the same speed.
You are the driver of the second car.
You reaction time will determine if an accident will happen or not.
(and how many cars will be involved in the incident)
The graph show the velocity for all the cars.
If the car turns to a red outline, you know what happened to it.
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Author : Fu-Kwun Hwang, Dept. of physics, National Taiwan Normal University