Find reaction time Materials: –Ruler or meter stick –Calculator –Scratch paper or notes –Do multiple trials.

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Presentation transcript:

Find reaction time Materials: –Ruler or meter stick –Calculator –Scratch paper or notes –Do multiple trials

Brake Assist Technology Applies full power to the brakes one second sooner than most drivers do. Mercedes says the system can cut stopping distances by as much as 45 percent.

Brake Assist Technologies Stopping distance tests show that most drivers without ABS can stop a car from 60 mph in 239 feet. Find the time of acceleration and the rate of acceleration.

Brake Assist Technologies Cars equipped with ABS stopped in just 131 feet. Assume the same initial speed as the previous problem. Find the same information.

An average car has a length of 15.5 ft. By how many car lengths does brake assist technology shorten your overall stopping distance? How far do you travel in the first second during deceleration WITH brake assist? Without? How many car lengths is this?

WHY??? What is the purpose of finding your reaction time and the brake assist questions?