Slowing a Car from 25mi/hr to Stop in 2s: How Long?

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SUMMARY

The discussion centers on calculating the time required to bring a car to a complete stop from an initial speed of 25 mi/hr, given the acceleration rate established by slowing from 60 mi/hr to 40 mi/hr in 2 seconds. The acceleration is determined to be -10 mi/hr². Using this acceleration, it is concluded that it will take 5 seconds to stop the car from 25 mi/hr. Additionally, the discussion includes a parallel example of peanut consumption, where the rate of eating 25 peanuts at the same speed results in a consumption time of 2.5 seconds.

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the brakes of a car can slow it down from 60 mi/hr to 40mi/hr in 2 s. how long will it take to bring the car to a stop from an initial velocity of 25 mi/hr at the same acceleration?
 
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You have 60 peanuts and you can eat them so fast, that in 2 seconds you have 40.

Hint: That's means you can eat 20 peanuts in 2 seconds!

At that speed, how long will it take you to eat 25 peanuts?
 
Assuming a constant rate of peanut consumption.
 

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