1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Force in pipe

  1. Jan 25, 2016 #1
    1. The problem statement, all variables and given/known data
    why for the force along the x -axis , the velocity is 12 cos 60 -12 ? why not 12cos60 12 , since they are in the same direction

    2. Relevant equations


    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Jan 25, 2016 #2

    Suraj M

    User Avatar
    Gold Member

    Since what are in the same direction?
     
  4. Jan 25, 2016 #3
    as wecan see , they are moving to the right
     
  5. Jan 25, 2016 #4

    Suraj M

    User Avatar
    Gold Member

    There are 3 there
    Please specify what you mean by “they”
     
  6. Jan 25, 2016 #5
    velocity along the x direction . (circled part)
     
  7. Jan 25, 2016 #6

    Suraj M

    User Avatar
    Gold Member

    That's not what I meant
    I meant which force the one due to outflow through A or B or the inflow. Of the 3 which 2 are you referring to?
     
  8. Jan 25, 2016 #7
    I wanna ask A and the inlet first
     
  9. Jan 25, 2016 #8

    Suraj M

    User Avatar
    Gold Member

    Then yes the pseudo force(cos component) and the inlet would add up
     
  10. Jan 25, 2016 #9
    so , the notes is wrong ? the velocity should add up ?
     
  11. Jan 25, 2016 #10

    Suraj M

    User Avatar
    Gold Member

    I'm trying to get my head around the fact that they've taken force due to the inlet twice.
     
  12. Jan 25, 2016 #11
    what do yo you mean ? we wanna find the resultant force , right ? So , the correct approach would be 12cos60 + 12 , right ? since they are both directed to the right
     
  13. Jan 25, 2016 #12

    Suraj M

    User Avatar
    Gold Member

    I'm not an expert in this but I do agree with you.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted