All Questions
Tagged with equilibrium newtonian-mechanics
195
questions
21
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2
answers
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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
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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
1
vote
2
answers
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 ...
0
votes
0
answers
47
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Lami's Theorem Problem
Lami's Theorem states that the magnitude of each force in an equilibrium state consisting of three coplanar, concurrent forces acting at a point is directly proportional to the sine of the angle ...
- 87
0
votes
1
answer
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
4
votes
1
answer
190
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Gravitational Null Points in a system of point masses
For an equilateral triangle formed by 3 point masses which has a circumradius 'a' there are 4 null points: The centroid and 3 other points on the angular bisectors of the three sides.
On calculation ...
0
votes
3
answers
119
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Is a body in uniform circular motion in equilibrium?
I know this question has been asked a myriad different times, but nowhere can I seem to find a definitive, final resolution to it.
Is a body in uniform circular motion in equilibrium?
- 379
0
votes
2
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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 ...
2
votes
2
answers
143
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Is bouncing ball (100% collision) an oscillatory motion/SHM or both or none?
My teacher told me bouncing ball (100% elastic) is oscillatory motion that does not have a stable equilibrium position and restoring force. It is just to and fro motion and thus called oscillatory ...
0
votes
1
answer
41
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The application of a minimum and maximum force
There are three blocks - a big block (C) above a horizontal surface that is smooth. A block (A) of mass m is resting on block C, and is also connected to another block (B) of mass m through an ideal ...
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 ...
-1
votes
3
answers
59
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Contradicting Basic and Force definitions of types of Equilibrium
This question is neither a check my work question and nor a homework question, it is a conceptual doubt in a question I found and I have attached a solution just for reference to show how I drew my ...
- 201
-1
votes
1
answer
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Identification of Stable, Unstable, Neutral Equilibrium
Definition of Stable Equilibrium - When a particle is displaced infinitesimally, it returns back to the mean position and starts oscillating about it. Unstable Equilibrium - When a particle is ...
- 201
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