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Finding Impulse and Velocity from Force vs. Time Graph

  1. Oct 3, 2012 #1

    MG5

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    Heres the graph.

    6-p-015.gif

    Heres the problem

    Mass of the object is 1.7 kg.

    (a) Find the impulse of the force.


    (b) Find the final velocity of the object if it is initially at rest.


    (c)Find the final velocity of the object if it is initially moving along the x-axis with a velocity of
    −1.9 m/s.

    Wouldn't the velocity be the area under the graph be the velocity?
     
  2. jcsd
  3. Oct 3, 2012 #2

    SammyS

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    No.

    It's not an acceleration vs time graph.
     
  4. Oct 4, 2012 #3
    Why don't you show us what you did and where you're stuck on a, b, and c.
     
  5. Oct 4, 2012 #4

    MG5

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    Don't even know where to start.
     
  6. Oct 4, 2012 #5

    SammyS

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    Well, you could use the impulse-momentum theorem.

    Or

    How is the graph related to an acceleration vs. time graph?
     
  7. Oct 4, 2012 #6
    If you want to find the impulse, it's force * time. Look at your graph again. It alone should be enough to find the impulse. The area of the graph does not represent the final velocity.
     
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