# Relative Velocity

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.

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

Center-of-momentum Frame - Two-body Problem
... 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 ...
Linear-rotational Analogs - Galilean Frame Transforms
... 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' ...
Kinematics of A Particle Trajectory - 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)