• Support PF! Buy your school textbooks, materials and every day products Here!

Force to open the gate

  • Thread starter foo9008
  • Start date
  • #1
678
4

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
 

Attachments

Answers and Replies

  • #2
haruspex
Science Advisor
Homework Helper
Insights Author
Gold Member
32,741
5,034
In what direction does FH act?
 
  • #3
678
4
  • #4
haruspex
Science Advisor
Homework Helper
Insights Author
Gold Member
32,741
5,034
Horizontal
Right, so how do you find its moment about A?
 
  • #5
678
4
Ok, I forgot it's horizontal force
 

Related Threads on Force to open the gate

  • Last Post
Replies
2
Views
464
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
458
  • Last Post
Replies
3
Views
4K
Replies
10
Views
1K
Replies
13
Views
938
  • Last Post
Replies
3
Views
2K
Replies
3
Views
24K
Top