Velocity: Difference between revisions
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[[Category:Done | [[Category:Done 2020-02-29]] | ||
[[Category:Translated to French]] | |||
[[fr:Vélocité]] | |||
<onlyinclude>'''Velocity''' is the measurement of [[speed]] included with a direction.</onlyinclude> Both speed and direction are measured relative to some fixed object (in most cases, our planet earth). The numerical value of speed can be represented as a negative, which would indicate the opposite direction as indicated. | <onlyinclude>'''Velocity''' is the measurement of [[speed]] included with a direction.</onlyinclude> Both speed and direction are measured relative to some fixed object (in most cases, our planet earth). The numerical value of speed can be represented as a negative, which would indicate the opposite direction as indicated. | ||
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Velocity can be calculated from by the following expression: | Velocity can be calculated from by the following expression: | ||
<math>\vec{v} = \frac{\Delta x}{\Delta t}</math> | <center><math>\vec{v} = \frac{\Delta x}{\Delta t}</math></center> | ||
The arrow above the velocity variable v indicates that it is a vector variable, and has some direction. | The arrow above the velocity variable v indicates that it is a vector variable, and has some direction. | ||
Latest revision as of 00:03, 27 September 2021
Velocity is the measurement of speed included with a direction. Both speed and direction are measured relative to some fixed object (in most cases, our planet earth). The numerical value of speed can be represented as a negative, which would indicate the opposite direction as indicated.
Equation
Velocity can be calculated from by the following expression:
The arrow above the velocity variable v indicates that it is a vector variable, and has some direction.
Velocity unit converter
Please see below to convert among various units for velocity:
Examples
The train was moving at 50 km/h west.
- 50km/h represents the speed
- West indicates the direction.
The Frisbee was thrown with a horizontal velocity of 10 m/s
- 10 m/s represents the speed
- the direction is horizontal, meaning the speed measurement is not accounting for the speed the Frisbee is falling
After the accident, the car was traveling at a velocity of -2 km/h
- The speed of the vehicle is 2km/h
- The direction would be the opposite direction which the vehicle is facing (intuitive deduction)
Hyperphysics has a more detailed discussion of velocity.