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Murljashka [212]
3 years ago
5

A rat runs 2m right, turns around and runs 3m left. Then goes 2m right. What is its displacement?

Physics
1 answer:
geniusboy [140]3 years ago
7 0

Answer:

Explanation:

I think this answer would be 1m to the left.

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Consider a vortex filament of strength Γ in the shape of a closed circular loop of radius R. Consider also a straight line throu
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Answer:

\vec{V} = \frac{\Gamma}{2R}\vec{A}

Explanation:

We define our values according to the text,

R= Radius

\vec{V} =Velocity

\Gamma =Strenght of the vortex filament

From this and in a vectorial way we express an elemental lenght of this filmaent as \vec{dl}. So,

\vec{dl}x\vec{r} = R*dl*\vec{A}

Where \vec{A} imply a vector acting perpendicular to both vectors.

Applying Biot-Savart law, we have,

\vec{V} =\frac{\Gamma}{4\pi}\int\frac{\vec{dl}x\vec{r}}{r^3}

Substituting the preoviusly equation obtained,

\vec{V} = \frac{\Gamma}{4\pi}\int\frac{R*dl*\vec{A}}{R^3}

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