Why Does the Solution Use FH(6) Instead of FH(10) for Gate Force Calculation?

  • Thread starter Thread starter foo9008
  • Start date Start date
  • Tags Tags
    Force Gate
AI Thread Summary
The discussion centers on the calculation of forces acting on a gate due to seawater pressure and a wall. The main point of contention is the use of FH(6) instead of FH(10) for calculating the horizontal force. One participant believes FH(10) should be used, as it represents the distance from the hinge to the wall. The conversation emphasizes the importance of understanding the direction of the horizontal force and its moment about the hinge point A. Clarifying these calculations is crucial for accurately determining the forces involved.
foo9008
Messages
676
Reaction score
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 don't 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

  • 167.PNG
    167.PNG
    13.7 KB · Views: 434
Physics news on Phys.org
In what direction does FH act?
 
haruspex said:
In what direction does FH act?
Horizontal
 
foo9008 said:
Horizontal
Right, so how do you find its moment about A?
 
  • Like
Likes foo9008
Ok, I forgot it's horizontal force
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Why must we use integral to find the resultant force?
Replies
4
Views
2K
Calculating Torque on a Gate in a Water Dam
Replies
1
Views
5K
Static Equilibrium of hinge Question
Replies
1
Views
7K
Force at a particular point on a submerged vertical surface (other than Ycp)
Replies
7
Views
2K
How to Calculate Hydrostatic Force and Center of Pressure on a Gate?
Replies
2
Views
2K
Question about resolving forces
Replies
7
Views
1K
Calculate the tension in the tie-rope between the rod and the wall
Replies
3
Views
3K
Calculating Forces in Equilibrium for Suspended Sign
Replies
4
Views
3K
Solve Moment Question: Find Force at Bottom of Ladder
Replies
1
Views
1K
Forces exerted on the ladder by the wall and ground
Replies
5
Views
7K

Hot Threads

Recent Insights

Back
Top