All Questions
Tagged with equilibrium statics
101
questions
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Statics problem from classical mechanics
I was solving David Morin's book on classical mechanics.
In the solution for the second part of the "a" part of the question, why is the normal force defined as $Ndθ$ and not just $N$? Is ...
- 19
15
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6
answers
2k
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How does this tensegrity table work?
I have assembled below a desk toy which seems to defy laws of physics at first glance (objects can be placed on top of it up to a certain limit, since it is already under strain).
The toy is in fact ...
- 1,410
1
vote
2
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111
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Serway & Jewett's definition of rotational equilibrium
On p. 364 of Physics for Scientists and Engineers (9th ed.), Serway and Jewett define a rigid object to be in rotational equilibrium if it has an angular acceleration of zero. They then state that a ...
2
votes
1
answer
49
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Investigating the stability of a wooden block
Consider the above experimental design. At the end of the strip, at point $p$, a mass $m$ is attached, the stability of the wooden block above is determined by the angle $θ$ at which the block topples ...
- 318
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66
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On beam suspended by wires
My question involves sample problem 9-8 of the book "Physics" by Halliday, Resnick and Krane, 5th edition. So I could understand the answer given but there is something that is not ...
- 3
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2
answers
55
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Direction of the normal force [closed]
Suppose we have a bar with non-zero mass inside a hemispherical bucket fixed to the ground. Suppose, too, that there is friction between the bar and the inner spherical surface of the bucket. Part of ...
-1
votes
1
answer
74
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Static equilibrium of linkage [closed]
I have a question regarding the calculation of the forces of a linkage in static equilibrium. Consider the mechanism in the figure. Points A and B can move in all 3 directions (hence they have 3 DoFs ...
- 101
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1
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82
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Can a body be in both static and dynamic equilibrium simultaneously?
I was just studying statics when I realized that a body can be in both static or dynamic equilibrium at the same time but I am not so sure.
My textbook says that an object at rest is in static ...
- 61
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1
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102
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Origination of internal forces in a beam under axial loads
Take a prismatic beam and subject it to a tensile loading, assume we are applying a load of 10 N on both of its ends. As we know, the beam stretches by a certain amount on either sides.
And since ...
- 87
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0
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123
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Calculate weight distribution on 2D plane
I am trying to figure out how I can have a formula for the weight distribution on a square. But let me just describe what I am doing,
We have the classical horizontal beam support problem
And I we can ...
- 13
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72
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Intuitive understanding of the mechanism of uniform bending moment
So many explanations on uniform bending moment and I can't understand until now how it works. I can somehow visualise that in order to resist the external bending moments created by equal and opposite ...
- 87
1
vote
2
answers
146
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Weight distribution and support polygon
I was working on a problem of supporting an object with sticks and wondering about some use cases that would fail.
My approach is to place the n-sticks (for example 4) under an object with mass m ...
- 13
0
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65
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2 rods connected at a pivot and attached to a spring
I have a question concerning this problem
First I calculate F1 by taking the origin at F2 and imposing equilibrium for the torque thus getting $ F_1 = \frac{a}{a+b} F $ and similarly for F2, then I ...
0
votes
1
answer
174
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Why the harmonic series appears when we stack a pile of books?
lets say we have some books resting on the floor.I am trying to find the maximum protuberance that the books can achieve.we see that the books on top of the initial book must have the center of mass ...
- 111
0
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4
answers
152
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Equilibrium on a plank
Consider the classic scenario of an equilibrium with a man standing at the centre of the plank, with the plank being held up by two trestles, say the man exerts a force of 500N at the point he is ...
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