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Acceleration, a kid, a sled and frictionless surface

  1. Feb 25, 2013 #1
    A child sitting on a sled is pulled by a rope along a frictionless surface. The child and the sled weigh 214 N and the horizontal force on the sled is 53 N. What is the acceleration of child and sled?






    I am new and in the process of printing and posting the PDF flyer at my local community college. Kudos to the Admin here for putting together.

    okay... I am trying to solve simply by going 214cos(53), 214sin(53) also trying to use the basic 4 kinematic equations but have hit a wall. A friend told me about this forum so here I am.

    Thanks in advance !
     
  2. jcsd
  3. Feb 25, 2013 #2

    CAF123

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    Gold Member

    What does the 214N actually represent? What direction does it act?
     
  4. Feb 26, 2013 #3
    128.79 ?
     
  5. Feb 26, 2013 #4

    berkeman

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    Staff: Mentor

    Please show all of your work that lead you to that number. Please also include units in your equations.
     
  6. Feb 26, 2013 #5
    Things to consider:

    1) How are force and acceleration related?
    2) What does the "weight" represent?
    3) What are the implications of the frictionless surface?
     
  7. Feb 26, 2013 #6

    NascentOxygen

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    Staff: Mentor

    Hi Trigulus, http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif [Broken]

    What are the units associated with that number?
     
    Last edited by a moderator: May 6, 2017
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