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Homework Help: Motion in one direction

  1. Sep 2, 2012 #1
    On a straight road, a car speeds up at a constant rate from rest to 20 m/s over a 5 second interval and a truck slows at a constant rate from 20 m/s to a complete stop over a 10 second interval. How does the distance traveled by the truck compare to that of the car?
     
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  3. Sep 2, 2012 #2

    SammyS

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    Hello sarah111. Welcome to PF !

    What have you tried?

    Where are you stuck?


    You should show some work before anyone gives help.

    ... but, here's a hint:
    What is the average velocity of each vehicle?​
     
  4. Sep 2, 2012 #3
    I feel like I can't answer the question because i don't know what the accceleration is. I tried using the equation for speed and found that the car stop 100m and the truck 200 but i dont feel that is right
     
  5. Sep 2, 2012 #4
    Sketch a velocity vs. time graph.
    The car starts from rest and constantly increasing the speed until finally attained 20m/s after 5 secs.
    The truck starts from 20m/s and constantly reducing the speed till zero.
    Distance travelled is - velocity x time
     
  6. Sep 2, 2012 #5

    SammyS

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    sarah,

    What equations do you know regarding constant acceleration?
     
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