All Questions
Tagged with equilibrium free-body-diagram
47
questions
21
votes
2
answers
2k
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A paradox while explaining the equilibrium of books
An even number of books (say four) are held in the manner shown in the figure. It is obvious that if we apply a large force inwards, we can increase the normal force, and hence the friction which ...
- 489
0
votes
1
answer
71
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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
votes
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
2
votes
2
answers
84
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A case of limiting equilibrium
I have noticed in the solutions of the problems of Friction of a physics book I'm studying from that in cases of limiting equilibrium, the force of friction $f$ to be equal to the coefficient of ...
0
votes
1
answer
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
0
votes
1
answer
96
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Why is the surface of a static liquid always perpendicular to the direction of net force acting on the liquid as a whole? [duplicate]
In a, let's say rectangular container, the water surface always aligns itself perpendicular to the direction of net force acting on it. Why exactly does it happen?
(For example when this container is ...
- 55
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
2
votes
1
answer
71
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Free body diagram of two cards leaning against each other [closed]
here is my body diagram:
he have the two weights two normals and two frictions however I think I am missing something becaused I only have cosine components when analysing the torque eq with respect ...
- 111
2
votes
3
answers
487
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Visualizing the center of mass of a stickman toy
I have this metallic stickman toy that is able to balance itself. I am curious about its center of mass. Can anyone help me visualize a rough position to where the object's center of mass is with an ...
0
votes
1
answer
447
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Need help with a physics question about a ladder leaning against a wall [closed]
I am struggling with a physics question that involves a ladder leaning against a wall. I have attempted to solve the problem, but I am not confident in my answer.
The question is as follows:
"A ...
- 19
0
votes
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 ...
- 137
1
vote
1
answer
133
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Question in Center of mass and toppling
Let's say a table has a heavy circular top of radius $R$ and mass $M$. It has four legs of lengths $l$ fixed symmetrically on its circumference.
Figure is something like thi
Now they are saying if i ...
- 117
1
vote
1
answer
402
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How does a gravity defying stand comes in equilibrium?
The gravity defying wine bottle stand are now becoming very common these days.
Can someone explain in detail the physics involved here?
Here is a video that gives details about its making.
- 823
2
votes
2
answers
353
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Will static friction be zero unless it's necessary for maintaining equilibrium? [closed]
While solving a problem related to equilibrium, I assumed that friction would be zero (I wasn't sure if it was correct) unless friction was required to maintain the system in equilibrium. This got me ...
- 143
0
votes
1
answer
134
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Cylinder on double edge with different angles - normal force
I'm looking for normal forces for this case:
So, let's say it's a case with cylinder of weight G in wedge with two different angles. What are the values of normal forces? It's confusing for me, ...
- 33