Velocity, or Speed
A fast-moving stream is called a river or a torrent.
Velocity includes direction in addition to speed, while speed only measures how fast something is moving. This means that velocity provides both the rate at which an object is moving and the direction in which it is moving.
Air moving very fast is typically referred to as "wind."
Speed and velocity both describe how fast an object is moving. The main difference is that velocity includes direction, whereas speed is just a measure of how fast something is moving regardless of direction.
Friction
"Fast-paced" is an adjective. It describes something that is moving or happening quickly.
fast moving
fast
moving fast in Japanese is "subayai"
Velocity, or Speed
The distance it covers in a unit of time.
Fast moving stream
Relative speed is the speed between two moving objects with no regards to a fixed reference. Speed is how fast something is moving with respect to an object.
How fast molecules are moving. If they are moving fast its hot, but if they are moving slow it is cold
Gas has fast moving particles.
Fast moving electrons are equivalent to beta radiation.