Solve Your Speeding Dilemma: Calculating Braking Time and Distance

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In summary, the conversation discusses the calculation of the minimum time required for a car to decelerate from 82 mi/hr to 55 mi/hr, given a braking acceleration of 14 ft/s2. The conversation also mentions the importance of understanding the problem and using relevant equations to find the solution.
  • #1
sabresfan2000
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The brakes on your automobile are capable of creating
acceleration of 14 ft/s2. If you are going 82 mi/hr and sud-
denly see a state trooper, what is the minimum time required to get your car to 55 mi/hr?

How far do you travel while returning to the legal speed limit?
 
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  • #2
You'll have to post where you're stuck at so we can provide the right direction. Just giving the answer won't help you in the long run.
 
  • #3
i don't know how to start the problem.
 
  • #5
You've been given acceleration, final velocity, and initial velocity, and are looking for time, right? Take a look at your equations of motion.
 

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