Force to open the gate

  • Thread starter foo9008
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  • #1
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Homework Statement


the gate is 3m wide , is hinged at point A , and rests against a smooth wall at B . Calculate the force on the gate due to seawater pressure and horizontal force exerted by wall at B . I have attached the sample answer below . I dont understand why the author use FH(6 ) instead of FH(10)
HmiBciz.png

1CaoYN8.png


Homework Equations




The Attempt at a Solution


IMO , it should be FH(10) , am i right ? 10 is the distance from A to B
 

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Answers and Replies

  • #2
haruspex
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In what direction does FH act?
 
  • #3
678
4
In what direction does FH act?
Horizontal
 
  • #5
678
4
Ok, I forgot it's horizontal force
 

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