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Physics question - Constant acceleration and distance travelled

  1. May 23, 2012 #1
    physics question -- Constant acceleration and distance travelled

    an object is moving with a constant acceleration, if it travels a distance d during the first 2 seconds and an additional D in the next 2 seconds the ratio of D/d is?

    a) 1
    b) 2
    c) 3
    d) 4

    i don't understand exactly what the question is asking me to do?
     
  2. jcsd
  3. May 23, 2012 #2

    berkeman

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    Staff: Mentor

    Re: physics question -- Constant acceleration and distance travelled

    Welcome to the PF.

    What is the equation that relates the distance travelled to the velocity and acceleration of an object? It is one of the basic kinematic equations for problems involving constant acceleration.

    Write out that equation, and the answer should be pretty straightforward...
     
  4. May 23, 2012 #3
    Re: physics question -- Constant acceleration and distance travelled

    vf^2-Vi^2=2adeltax is the equation you're talking about? i tried rearranging that for x and have no clue where to go from there
     
  5. May 23, 2012 #4
    Re: physics question -- Constant acceleration and distance travelled

    vf^2-Vi^2=2adeltax is the equation you're talking about? i tried rearranging that for x and have no clue where to go from there
     
  6. May 23, 2012 #5

    berkeman

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    Staff: Mentor

    Re: physics question -- Constant acceleration and distance travelled

    No, I'm referring to the equation for x(t) in terms of initial position, initial velocity, acceleration, and time...
     
  7. May 23, 2012 #6
    Re: physics question -- Constant acceleration and distance travelled

    Use area of a triangles and square in a velocity-time diagram.
    You can find v1, 2 and acceleration from this constant acceleration diagram.
    Since it is a ratio you can start for v0=0.
     
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