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A body moving in a straight line with constant accelaration

  1. Nov 23, 2011 #1
    1. The problem statement, all variables and given/known data
    A body moving in a straight line with constant accelaration takes 3 seconds and 5 seconds to cover two successive distances of 1m.Find the accelaration?


    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 23, 2011 #2
    Re: accelaration

    Constant Acceleration. Hint is in the question.
     
  4. Nov 23, 2011 #3
    Re: accelaration

    i didnt get u
     
  5. Nov 23, 2011 #4
    Re: accelaration

    Hmm, seems impossible without more information (i.e. initial or final velocity). Did you copy the question down properly?
     
  6. Nov 23, 2011 #5
    Re: accelaration

    question is right
     
  7. Nov 23, 2011 #6

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Re: accelaration

    It looks straight forward to me. Take the initial speed to be v and acceleration to be a. Take t= 0 at the beginning of the first second in which the object goes 3 feet.

    The distance such an object covers is t seconds is [itex]vt+ (1/2)at^2[/itex]. In one second, it will have gone distance v+ (1/2)a. In two seconds it will have gone distance 2v+ 2a. What distance did it go the second second? Set those equal to 3 and 5 and you have two equations to solve for v and a.
     
  8. Nov 23, 2011 #7
    Re: accelaration

    So simple, nice one.
     
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