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A Question about displacement

  1. Mar 11, 2010 #1
    Hello there ,
    http://www.zshare.net/image/73581857700fb471/ [Broken]

    If I am asked about the displacement covered by the man in this case , so should I write the vertical distance covered by the man (15 m) or the horizontal one (30 m) ??or they both work??
    And why??
    My question is the same for a rebounding ball
    Thanks
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 11, 2010 #2
    The displacement in this case is the length of the hypotenuse of the triangle in the picture. Given the angle (30 deg.) and the vertical displacement (15m) you can find the total displacement.

    Here's a good overview if you don't understand displacement: http://physics.info/displacement/

    -David
     
  4. Mar 13, 2010 #3
    Yeah I got this
    but if we have a bouncing ball like this :
    http://www.zshare.net/image/736726542f10869f/ [Broken]
    the ball fall freely from a point to the ground then re-bounced again and again till it stopped on the surface of earth.
    So Should the displacement be AB or AC?

    Thanks
     
    Last edited by a moderator: May 4, 2017
  5. Mar 13, 2010 #4

    Doc Al

    User Avatar

    Staff: Mentor

    The displacement goes from initial position to final position.
     
  6. Mar 13, 2010 #5
    A to B - like Doc said, its the distance between the initial and final positions. All the bounces can be ignored.

    -David
     
    Last edited by a moderator: May 4, 2017
  7. Mar 25, 2010 #6
    Yes I got it
    thanks
     
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