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Questions tagged [statics]

Statics is branch of engineering concerned with the analysis of forces and moments on physical systems in static equilibrium.

When a system is in static equilibrium it experiences no acceleration (the net force on the system is zero). Questions regarding statics problems should be asked here.

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How to draw a shear force diagram when two forces are acting at the same point

I am working on this question on my statics assignment: Approximately at point B there are two forces, 20kN and 50kN.So far, I have only calculated global equilibrium and got the following…
AugieJavax98
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Shear Force Diagram of a Simply Supported Beam with triangular load distribution

I've been attempting this fundamental shear force diagram problem for several days, but can't seem to get the correct result. I'm trying to calculate the shear force diagram in terms of $x$, but I'm unsure about the intensity $w(x)$ of the…
AVelj
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How to calculate a tripod table's stability?

I have designed a circular, 800 mm (31.5") diameter tripod table. The top is made of stone and weighs 40 kg (88 lbs). The height of the table is 750 mm (29.5"). There is a central column with tripod feet lower down which touch the floor 108 mm…
rupert
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Why does the minimum force have to be parallel to the incline?

If we have an object on a frictionless inclined bench, why does the minimum force applied to keep it steady have to be parallel to the incline (or perpendicular to the reaction force)? In other words, why does the angle θ in the image have to be 0…
Elruz Rahimli
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Car which can climb the ramp of higher inclination

Two automobiles both of which have the mass center located midway between the front and rear axles,are identical except that one is front-wheel-drive and the other is rear-wheel-drive.The cars are driven at constant speed at ramps of various…
user471651
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Free Body Diagram Problem

I'm having trouble with this problem: G and a are given, and we are asked to calculate A, B and C. What I've Done: The first thing I tried was a free body diagram cutting through A and C to create one body and C and B to create another. From…
Andy Grey
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Finding the components of a vector along two other vectors

Using only the diagram above (Not using the questions in the diagram), i am asked to find the components of F2 along F1 and F3. I am having trouble with this question. I can easily resolve any of the vectors into their x and y components but I am…
Shaun
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Drawing Bending Moment Diagrams

How do I know when to use an upward or a downward curve when I'm drawing a bending moment diagram for a uniformly-distributed load (UDL) and what's the most reliable way of identifying the maximum bending moment?
CcoderBeginner
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Statics Reactions

I'm trying to do this problem using components but I'm having trouble. I see no reason why I can't use this to solve. Maybe I got one of my variable wrong? Can some one help me figure out what I'm doing wrong?
r2d2
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Statics Question

I have shared the question statement, its diagram and my solution but my solution is wrong and I have no idea why is it wrong, please help me out.
DemonLordKing
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Included angle in a semicircle

I'm solving this problem in mechanics, Two cylinders A and B, weighing 100 lb and 200 lb respectively, are connected by a rigid rod curved parallel to the smooth cylindrical surface shown in Fig. P-329. Determine the angles α and β that define the…
Vilmar Cabañero
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How can we derive the formula of the centroid?

In order to find the coordinates of the center of an area, we can use this formula: $$\begin{align} \overline{x} &= \frac{\int x\text{d}A}{A} \\ \overline{y} &= \frac{\int y\text{d}A}{A} \end{align}$$ How can we derive this formula? Can you help…
Eman.suradi
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Why is the truss member between two fixed supports zero?

If i first assume the member(far left) to not be zero and use method of joint at both points of constraint, with both constraints having unknown vertical reaction, it cannot be solved. Load and lengths are known, horizontal reaction can be found.
desperate
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Draw the FBD of the entire frame, assuming that friction and the weights of the members are negligible. How many unknowns appear on this FBD?

Draw the FBD of the entire frame, assuming that friction and the weights of the members are negligible. How many unknowns appear on this FBD? This is what I've tried so far. I have four unknowns. They are F1, F2, F3, F4
Eugene Escalante
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Why is the moment of forces on a rigid body in static equilibrium must be zero about any point, even if the position of that point is not on the body

Why is it necessary for the moment of the forces on a rigid body in static equilibrium to be zero about any point, even if the position of that point is not on the body itself.
صهيب أبو ريدة
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