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Crazy oscillating graph

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  1. Dec 4, 2014 #1
    phys 2.png 1. The problem statement, all variables and given/known data


    2. Relevant equations
    v= d/t

    3. The attempt at a solution
    v= T/A
    It is decreasing I think E
     
  2. jcsd
  3. Dec 4, 2014 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF.

    No, the answer is not E. Think in terms of forces. What is the Relevant Equation that relates the spring force on the mass to the displacement of the mass from the uncompressed position of the spring...?
     
  4. Dec 4, 2014 #3
    Hookes law?
     
  5. Dec 4, 2014 #4

    berkeman

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    Staff: Mentor

    Yep, good. So write out Hooke's law for this problem. If the graph shows the displacement versus time of the mass, can you plot the Force versus time on the same time axis? What is the force when the displacement is zero?
     
  6. Dec 4, 2014 #5
    F= -kX
    So
    F= -(A)(T)
    So thuis mean - and 0 so C?
     
  7. Dec 4, 2014 #6

    berkeman

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    Staff: Mentor

    Yep, good! That's why we have the section of the Homework Help Template that asks for the Relevant Equations. Often just by listing the equations that are involved, it makes figuring out the problem much easier. :-)
     
  8. Dec 4, 2014 #7

    berkeman

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    Staff: Mentor

    Actually, one small typo fix -- you correctly show F=-kx, but then you say F=-AT. It should be F=-A*0 = 0. But I think that's what you meant anyway.
     
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