# Questions tagged [statics]

Analysis of a system of bodies where all forces are in balance and there is no motion relative to a chosen reference frame.

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### Water column's pressure canceling out problem and it's microscopic point of view

If you see my horrible reference picture, you will see that the U shaped tube is placed inside the field where gravitational force exist. And the bottom of the tube is opened, tube is filled with ...
37 views

### If a Triangular Lamina is Held Horizontally by 3 Vertical Strings, What would be the Tensile forces developed? [closed]

Suppose the three Strings (mass less) at A B and C hold the triangular Lamina in a purely horizontal position while remaining perfectly vertical. Now by pure imagination we can visualize that the ...
47 views

### Does putting a thin metal plate beneath a heavy object reduce the pressure it would have applied without it

My dad bought an earthen pot and he kept it on our glass table. Worried that the glass could break on filling the pot with water. I kept a metal plate beneath it. At first, it seemed like a good idea ,...
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### How do we decide which tension forces get included in the force- and torque-balance equations?

Consider a static equilibrium problem like the following: The uniform boom shown below weighs 700 N, and the object hanging from its right end weighs 400 N. The boom is supported by a light cable and ...
60 views

### Two standing sticks with a hinge, seems to lead to a paradox?

I have kind of a paradoxal question about two sticks connected through a hinge that rest on a frictionless floor at the bottom and frictionless walls on each side at the top. What are the forces in ...
44 views

### Why the dust on the wing cannot be cleaned by air flow? [duplicate]

I recently saw that the dust on the airplane's wings are frequently cleaned by some human workers (generally after every trip, workers clean the fine dust on wing's surface by hands). But I have a ...
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### How to prove that objects have nonzero torque when center of gravity is outside area of support?

I’ve been learning the concepts of static equilibrium and the book I’m using is providing examples of objects that are unstable when their center of gravity is outside the area of support. For example,...
31 views

### What forces are applied to the wall when some thing like a cooler is attached to it? what makes the normal force? [closed]

what force throw to the wall is applied in this situation? what force does this wood is importing to the wall that makes the normal force?
25 views

### Biomechanics statics of an push-up [closed]

So I am really struggling with a statics problem about calculating forces and torques of an exercise. So I need to calculate the forces acting on the feet and hands, as well as the torques, for 2 ...
42 views

### How to find the equilibrium point of a system that is bowl shaped and a mass inside the bowl with given potential energy function?

Question: $z=U(x, y)=ax^2+by^2, (a,b \in R^+)$ is the potential energy function of the system. How to find the equilibrium point of this system? We have to find the equilibrium point of this system ...
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### Intuition behind First moment of area and link to centroids

I essentially have the same question, however only concerning the First moment, as this user ,however none of the answers satisfy my questions. I understand that we are trying to get a sense of the ...
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### Forces in statically indeterminate system

I am a bit puzzled about the meaning of statically indeterminate in particular in terms of force distribution. The following system is clearly statically indeterminate: There are four reaction forces ...
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### Deflection of L bracket [closed]

I want to calculate the deflection for an L bracket like https://imgur.com/a/0PabX0T to determine how thick I will need to make the steel for a workshop shelf. I have done the calculation using the ...
56 views

### How can I calculate the coordinates of segments that form a hanging chain?

I'm trying to get a chain physics model with segments. I'm feeling rather stupid, but how can I calculate which is the new position of each dot when the chain moves its ends? expressed in another ...
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### A problem about moment (torque ) [closed]

Everybody knows that moment of a force increases with distance. However, there is a problem about it that makes me confused these days: Let's take a look at this picture due to the formula M = F.d, ...
55 views

### How to derive the equation to calculate height of stopper? [closed]

I have a spherical ball of radius r places on an inclined plane of angle θ. What should be the minimum height of the stopper <...
59 views

### Moment of force about a point definition

In defining the moment of a force about a point as "the tendency of one or more applied forces to rotate an object about an axis [going through a point, hence also about a point]", I see it logical to ...
56 views

Could anyone explain the case of a ladder leaning on a smooth floor and against a rough wall? It's not clear how there is a vertical frictional force at the wall despite having zero normal reaction ...