The **relative velocity** (also or ) is the velocity of an object or observer **B** in the rest frame of another object or observer **A**. If it is constant,

where is **A'**s velocity in the rest frame of **B**.

Read more about Relative Velocity: Classical Mechanics, Special Relativity Theory, Example

### Other articles related to "velocity, relative, relative velocity":

... The transformations are applied to take the

**velocity**of the frame from the

**velocity**of each particle from the lab frame (unprimed quantities) to the COM frame (primed quantities) where V ... Since V is the

**velocity**of the COM, i.e ... It has been established the

**velocity**of the COM frame can be removed from the calculation using that frame, so the momenta of the particles in the COM frame can expressed in terms of the quantities in the lab frame (i ...

... rotation) frame (reference frame traveling at constant

**velocity**- including zero) to another is the Galilean transform ... Unprimed quantities refer to position,

**velocity**and acceleration in one frame F primed quantities refer to position,

**velocity**and acceleration in another frame F' moving at translational

**velocity**V or angular ... Conversely F moves at

**velocity**(—V or —Ω)

**relative**to F' ...

**Relative Velocity**

... The relations between

**relative**positions vectors become relations between

**relative**velocities by computing the time-derivative ... The second time derivative yields relations for

**relative**accelerations ... For example, let the particle B move with

**velocity**VB and particle A move with

**velocity**VA in a given reference frame ...

**Relative Velocity**- Example

... Joe’s

**velocity**is 90 km/h and Sara’s 100 km/h ... If we take Joe’s

**velocity**as and Sara’s then This is the

**velocity**observed by Joe ... Joe’s

**velocity**is 90 km/h and Sara’s 100 km/h ...

### Famous quotes containing the word relative:

“And since the average lifetime—the *relative* longevity—is far greater for memories of poetic sensations than for those of heartbreaks, since the very long time that the grief I felt then because of Gilbert, it has been outlived by the pleasure I feel, whenever I wish to read, as in a sort of sundial, the minutes between twelve fifteen and one o’clock, in the month of May, upon remembering myself chatting ... with Madame Swann under the reflection of a cradle of wisteria.”

—Marcel Proust (1871–1922)