Physics of Paying Attention

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Presentation transcript:

Physics of Paying Attention Stopping Distance Reaction time Lab Texting and Driving Physics of Paying Attention

SCENARIO Imagine your traveling in a car at 68mi/hr and you look away for one second to [change the radio station / check a text message / to look at the pretty trees / or any reason], why is it a bad idea to do this?

Physics Distance traveled in a second. Human Reaction Time Breaking Distance.

So in that second you travel 100 feet! Distance Traveled 68mi/hr is the same as 100ft/s. So in that second you travel 100 feet!

You are moving 100ft/s while this is going on! Reaction Time Perception time (recognize the danger) Reaction time (decide what to do) Action time (pushing the break pedal). You are moving 100ft/s while this is going on! 1s = 100 more feet

WORK AND KINETIC ENERGY (KE = ½ mv2) (W=Fd) Breaking Distance WORK AND KINETIC ENERGY (KE = ½ mv2) (W=Fd)

Breaking Distance At 68mi/hr its about 250ft. This assumes: --roads are dry --your tires are in optimal shape --your breaks are good.

Stopping Distance 68mi/hr 100 feet (looking away for a second). 100 feet (thinking and reacting). 250 feet (breaking distance). 450 total feet to stop!

Stopping Distance 35mi/hr ~50 feet (looking away for a second). ~50 feet (thinking and reacting). ~60 feet (breaking distance). 160 total feet to stop!