Intro Physics distance-to-a-stop

[maff is tuff]

Homework Statement

The "reaction time" of the average automobile driver is about 0.700 s. (The reaction time is the interval between the perception of a signal to stop and the application of the brakes.) If an automobile can slow down with an acceleration of 12.0 ft/s^2, compute the total distance covered in coming to a stop after a signal is observed from an initial velocity of 15.0 mi/h. Give your answer in meters.

Homework Equations

v=(x-x0)/t

v^2=v0^2 + 2a(x-x0)

The Attempt at a Solution

My attempt is attached below. This is one of many attempts and I still am not getting the correct answer. I feel this attempt may be the closest (at least in concept) out of all of them. Thanks in advance for all the help :)

 

[nayfie]

I noticed that you converted your units. Perhaps they wanted the answer in feet or miles? I can't see any errors from brief inspection.

 

[maff is tuff]

Yeah it is online homework. The space provided looks like this:

After the answer box where I type my answer in, it has an "m" after it.

So I'm guessing the "m" means meters right? I've always seen meters as m and miles as mi.

 

[ojs]

check your acceleration conversion, you think 12 feet is 365.76m?

 

[maff is tuff]

You're right that doesn't make sense. I think I forgot to divide by 100. It should be 12ft = 3.66 m

It's scary because I did that conversion over three times and apparently forgot to divide by 100 every time.

Thanks for the catch