# Tagged Questions

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### Euclidean Geometry in Physics

I've started tutoring my 13 year old niece in math. She learning geometry this year (it's a year-round school). Obviously, it'll just be basic Euclidean geometry -- though I might try to get to a ...
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### The Graphic Representation of Physical Quantities (Vectors only)

We usually use the figure such as the one below for the graphic representation of physical quantities such as forces: What should we call this figure? Should we call it a ray? But a ray is defined ...
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### velocity confusion

A velocity encompasses both speed and direction in a single vector. I'm a little bit confused about how to separate the two. I have 2 creatures. The first is located at position (x1, y1). The second ...
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### Question Concerning Magnitude And Direction Of The Accleration For Uniform Circular Motion

To find the magnitude and direction of the acclleration for the uniform circular motion,we consider the below figure Where in particle $p$ moves at constant speed $v$ around a circle of radius ...
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### transforming vector potential with a coordinate rotation

In electrodynamics, given the vector potential $\vec{A}$, the magnetic field is defined as: $\vec{B} = \nabla \times \vec{A}$ I'm having trouble figuring out how a coordinate transformation (a ...
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### Solid body rotation around 2-axes

I am trying to understand how to describe the rotation of a solid body flying in 3D space. From physics forums, I understand that the rotation of any solid object in space, is around 2 axes ...
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### Aren't asteroids contradicting Euler's rotation theorem?

I am totally confused about Euler's rotation theorem. Normally I would think that an asteroid could rotate around two axes simultaneously. But Euler's rotation theorem states that: In geometry, ...
Snell's law from geometrical optics states that the ratio of the angles of incidence $\theta_1$ and of the angle of refraction $\theta_2$ as shown in figure1, is the same as the opposite ratio of the ...