All Questions
Tagged with equilibrium rotational-dynamics
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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 ...
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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 ...
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Is a body rotating in equilibrium? [duplicate]
If a body is performing a uniform rotation, do we consider it to be in equilibrium because of its constant speed? Or not because it has the centripetal force acting upon it so the sum of all forces is ...
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Rotational Equilibrium With Forces acting on only two points
Imagine a rod that is held at angle to the vertical by some hook. The rod is in equilibrium. There would be three forces on this rod - Normal contact, Friction, and the weight of the rod.
I struggle ...
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Stabilization angle of standard see-saw system
When discussing torques on a beam-balance (or see-saw) system, most textbooks focus on the requirements for the equilibrium of the system while being horizontal. However, I got interested in the ...
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What the are forces acting on a wheel of a moving bicycle?
For the wheel of moving bicycle or bike why is net torque $0$
i.e $\tau_{\text{NET}}=0$?
If it can be shown that the wheel is in translational equilibrium i.e. $\sum_{}^{}\vec{F}=0$ then it's also in ...
- 658
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Why is lever in mechanical equilibrium?
Let's consider a lever with a fulcrum (see image below), such that it's load arm and load are $d_1$ and $F_1$, respectively, and it's effort arm and effort are $d_2$ and $F_2$, respectively. Now my ...
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Proof that the second condition of equilibrium is equivalent to no rotation
I'm currently working my way through an introductory mechanics course, using University Physics with Modern Physics by Young and Freedman.
I understand that the first condition for equilibrium, i.e. $\...
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115
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Weight of the hinge
Why is the weight of the hinge itself not considered, or is $H_y$ the sum of the friction force upwards and the weight of the hinge downwards?
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High wire artist
We want to derive a Lagrangian equations for a high wire artist which uses a balancing rod for stability purposes. We know the masses and the polar moment of inertia of the artist and the rod.
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Can someone explain Couple with respect to forces acting on it?
Suppose two inequal, parallel and opposite forces $P$ and $Q$ are acting on a body not along the same line, producing a clockwise moment. If the rod on which its acting is massless, then we can extend ...
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Differences resulted from calculating torque using different axis of rotation [closed]
A parked automobile of mass 1360 kg has a wheel base (distance between front and rear axles) of 305 cm. Its center of gravity is located 178 cm behind the front axle. Determine (a) the upward force ...
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How is the torque about any two reference points (in the system) when a body is in translational equilibrium of same value?
Here's what the textbook says
The equilibrium condition for the torques is true for any choice of the axis about which the torques are calculated. To prove this statement, we consider a rigid body on ...
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If we are opening a door does the distance of the hand from the pivot influence how much of moment will be lost just to press the pivot?
If we are opening a door does the distance of the hand from the pivot influence how much of moment will be lost just in an useless press of the pivot? Is it correct thinking that as far from the hinge ...
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Stability analysis basics
I would like to see a rigorous treatment of stability analysis.
For example, a lot of high-school level texts give examples like this: https://courses.lumenlearning.com/physics/chapter/9-3-stability/
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