# Difference between revisions of "Speed"

(removing broken category) |
Pi is 3.14 (talk | contribs) (→Definition) |
||

Line 1: | Line 1: | ||

+ | ==Speed Distance Time Video== | ||

+ | https://youtu.be/rQUwNC0gqdg?t=2557 | ||

+ | |||

==Definition== | ==Definition== | ||

## Latest revision as of 18:59, 12 August 2020

## Speed Distance Time Video

https://youtu.be/rQUwNC0gqdg?t=2557

## Definition

**Speed** is the scalar quantity of change in distance travelled along a path, divided by the time it takes to travel that part of the path.

## Contrast with velocity

Speed is different from velocity, the latter has direction. Here's why that changes things:

Say wanted to get to , if can only travel the paths drawn, would have to go 6 units of length (be they metres,kilometres, miles, yards,etc.). If they take 6 minutes then they averaged 1 unit of length per minute, this is their average speed (usually taken to just be speed).

On the other hand, **velocity** depends on a distance (called displacement) and '**direction**. If A walks around the block (4 equal sides), she may have walked 4 units of length in 4 minutes; giving her a speed of 1 unit of length per minute. However she has a distance from point of origin (called displacement) of 0 units of length; therefore her velocity is 0 units of length per minute in the opposite path direction to which she arrived back at the point of origin.

See Also: