Questions tagged [rotational-dynamics]
A tag for questions about the mechanical interactions of rotating objects, including torque and angular momentum.
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Could enough people spin Earth backwards faster than they could run? [duplicate]
So, consider the theoretical situation in which the earth is no longer spinning, and we want to spin it up by running in the opposite direction (Yes, this question was inspired by the Nike commercial)....
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Why do heavier objects roll faster down a hill? [duplicate]
My main question is why more liquid would roll down a ramp faster than less for a viscosity assignment, however I would like to have a full understanding of why heavier objects would roll faster down ...
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A horizontal plank is moving towards right over a system of 3 roller drums as shown .the ratio of transilational spped of smaller and larger drum [closed]
the ans for 21st is 1A horizontal plank is moving towards right over a system of 3 roller drums as shown .the ratio of transilational spped of smaller and larger drum
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An alternative explanation of electron distribution in a Hydrogen atom
So basically I have this idea, we can't see how does an electron really move because of its small size and the wavelength of light being comparatively being much larger. What if we took two spheres (...
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How to compute the angular momentum at some point based on the angular momentum at the center of mass? [closed]
Can you explain what is the third vector (the one with the tag) in the following equation:
\begin{align}
\vec{L} = \vec{L}_{\text{cm}}+\vec{L}'
\end{align}
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Is it possible for an object to rotate and move forward at the same time? [closed]
Is it possible for an object to rotate and move forward at the same time? Hi, my question revolves around the Tv show "Beyblade metal fusion". in this show they launch these spinning tops into a ...
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How to decide the axis of rotation? [closed]
The question
The Solution
Part (c) is where I have a doubt ...
How do I approach such problems?
They way I approached such problems (and most of them had sufficient friction so that that the ...
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How the centripetal forces work on a point in a rigid body? [closed]
I know it was a question but when I asked last time I did not know the answer. It has been suggested that the question is not clear, it's badly written. Now I know the answer and I can introduce them ...
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Why centripetal force does not pull the object towards the center? [duplicate]
I know that the force is used to change the direction of the velocity but my question is while it has 3 options either to pull the object towards the center or change the direction of velocity or both....
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Reactionless propulsion method (not physics heresy!?) [closed]
Description of process:
water or some other low viscosity fluid is rotated in a cone by an impeller or other means, and then ejected tangentially at the point where it climbs the highest (due to ...
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How can I calculate the internal angular acceleration? [closed]
This is a very well known topic and affects angular velocity.
How does changing the moment of inertia affect angular velocity?
An object that changes the moment of inertia simultaneously changes the ...
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Could a meteor cause the flood from Noah's time in the bible? [closed]
Using the Bible (as a historical record) it was said before Noah's flood people lived to be around a thousand years old. Shortly after the flood the life span went to about 120 years. present day the ...
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Angular velocity: $\omega = vr$ or $\omega = v/r$? [closed]
Which one is the formula of angular velocity? Is it $\omega= vr$? If not then why does the source below use $mvr=nh/2\pi$, where $mvr$ is angular momentum and $vr$ is angular velocity? Again $\omega=v/...
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