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Homework Help: Find a Fnety force

  1. Apr 18, 2010 #1
  2. jcsd
  3. Apr 18, 2010 #2

    PhanthomJay

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    If you have been drawing free body diagrams, you should note that the reading on the scale is the tension in the cord.
     
  4. Apr 18, 2010 #3
    hmmm i am trying it should be equal to zero the other force so they cancel each other isnt right?
     
  5. Apr 18, 2010 #4

    PhanthomJay

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    In part a, the tension in the cord 'cancels out' the weight of the salami, and therfore, the salami doesn't move (F_net = 0 per Newton 1 for bodies at rest). But that does not imply the spring scale reads 0 for that case, does it? Is the scale reading in part c different from the scale reading in part b? Why or why not?
     
  6. Apr 18, 2010 #5
    its is the same but i guess they cancel each other cuz of the same force is this correct?
     
  7. Apr 18, 2010 #6

    PhanthomJay

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    The tension on each side of the spring scale is the same. But what does the spring scale read in part c?
     
  8. Apr 18, 2010 #7
  9. Apr 18, 2010 #8

    PhanthomJay

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    Yes. In Newtons.
     
  10. Apr 18, 2010 #9
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