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Math Help - physics

  1. #1
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    physics

    . A sports car can accelerate from 0 to 60 mi/h in 3.9 s. What is the magnitude of the average acceleration of the car in meters per second squared?
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  2. #2
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    well step a is to get rid of the miles per hour, and rewrite them as meters per second, once youve done that as the word average implies, divide by 3.9
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  3. #3
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    Quote Originally Posted by cruzangyal View Post
    . A sports car can accelerate from 0 to 60 mi/h in 3.9 s. What is the magnitude of the average acceleration of the car in meters per second squared?
    1 mile = 1609.344 m,

    so 1mph = 1609.344 m/h = 1609.344/(60*60) m/s ~= 0.447 m/s

    So 0 to 60 mph in 3.9 s is 0 to 26.82 m/s in 3.9s, so the average acceleration is 26.82/3.9 m/s^2.

    RonL
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