Questions tagged [torque]
This tag is for questions regarding to torque, which is a measure of the increase in angular momentum over time.
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Spinning plate on the barbell
Suppose I have a plate and a barbell like the ones we see in the gym. When I spin the plat in the clockwise direction, the barbell also starts spinning in the clockwise direction. When I put my hand ...
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Can torques cause both transitional and rotatory motion?
Imagine a rod (a rigid body) 10 meters long that is freely floating in space without being attached at any point. Its mass is 12 kilograms and according to most sources I found, its moment of inertia ...
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How torque and linear force interact with forces on poles
When there are 2 forces normal to each end of a uniform pole, if they had the same force, the rotation would be cancelled out and all force would be acting in one direction. But if one force was ...
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What happens if we prevent gyroscope to precess?
If we apply some torque to spinning wheel in a vacuumed space in body frame y axis, wheel try to precess due to gyroscopic effect but it will be prevented by obstacles as seen from picture,
what will ...
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What determines the mechanical advantage of a lever?
This question is more specific than it seems. I am doing a mechanics-related project in class and we are learning about the functions of levers. Basically, I am confused as to what determines the ...
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What is angular momentum and torque due to the center of mass? Give me an example
when I was studying angular momentum and fixed axis rotation in kleppner book, I had a topic on motion involving translation and rotation. On that topic, they said that components of angular momentum ...
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Torque applying on both rotating and non-rotating object
In rod reference frame:
origin is center of the rod,
pitching axis is coinciding with the rod
external torque is applied in rolling axis
If a torque is applied to non-rotating object(the rod and the ...
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What is the physical meaning of the torque term involving the magnetic displacement force?
In Zangwill's Modern Electrodynamics the magnetic torque is derived in Eq. 12.63 to be
\begin{equation}
\mathbf{N}(\mathbf{r}_0) = \mathbf{m} \times \mathbf{B}(\mathbf{r}_0) + \mathbf{r}_0 \times \...
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Is there a maximum angular acceleration due to gravity for a given radius?
I'm having trouble understanding the relationship between angular acceleration and tangential acceleration, specifically, how can an angular acceleration created by the tangential acceleration of ...
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How are gears and levers related?
@1:46 https://www.youtube.com/watch?v=85qX5GwkSTY
"Now the short arm moves 1/4 the distance, but we get 4 times the force"
I do not understand what is meant by this part. This video is ...
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What are the conditions for the uniform circular motion of this small ball? [closed]
As shown in the figure, one end of the rigid rod is a small ball, and the other end of the rod is supported on a plane. The gravitational field of the Earth is vertically downward, thus forming a ...
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What is the point of torque?
I am having a hard time understanding torque. What is the physical significance of torque? Why is it defined as $\mathbf{r} \times \mathbf{F}$? I know that torque helps us to calculate the angular ...
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Energy due to force acting on a rod
Let us consider a rod of length $L$. We apply a force $F$ on this rod in a direction perpendicular to its length. There are two possible cases, we apply the force on the center of mass of the rod, or ...
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Is this an example of precession, or is its motion more complicated?
Let's say there is a solid cylinder floating in space and rotating about its axis of symmetry at rate $\omega$. At time t = 0 a force constant in magnitude is applied to the bottom of the cylinder. ...
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Rotational mechanics in collision of a mass and a rod
Suppose a small particle of mass $m$ moving at a velocity $v$ collides with a rod at the end in a perpendicular direction to the rod. I am sure that the rod translated in the direction same as the ...
