# Tag Info

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### Which experimental setup replicating Michelson-Morley experiment had the longest path of light?

Experimental setup in Ligo uses replica of Michelson Morley interferometer with additional etalon used to increase the optical path length .The effective path length along each arm by adding etalon ...

### How does the definition of a rigid body imply constant distance from the center of mass?

Let us cosider the case of $N$ material points $\vec{x}_i$, with masses $m_i$, $i=1,2,\ldots, N$. Let us denote by $\vec{G}$ the position of the center of mass and by $M$ the total mass. M(\vec{G} - ...

### How to determine whether an object is a point object?

However, the question supplies limited information, motion is a relative concept and such physical problems can be idealized depending on the objective. Generally, point objects have dimensions that ...

### How to determine whether an object is a point object?

A geometric point doesn’t spin or tumble. Only extended objects do. Newton’s second law $F=ma$ applies to a point object or to the center of mass of an extended object where all the mass can be ...

### How to determine whether an object is a point object?

The question cannot be answered without some more context. For example you could assume that a railway carriages is a point object at its centre of mass perhaps in determining a displacement, ...

### How to determine whether an object is a point object?

If for the purposes of a given problem the only relevant energy associated with a body is the kinetic energy of its center of mass, then you can think of it as a "point object" (the "...