"In everyday use and in kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time..."
The magnitude of velocity.
Acceleration: :.
Graphing Motion: :.
Relative Motion: :.
Inclined Planes: :.
Uniform speed: A motion with a constant speed, covering equal distances in equal intervals of time.
Variable speed: A motion in which the speed varies at different times during the motion.
Instantaneous speed: The speed of an object at a specific instant in time, calculated by dividing the distance covered by the time taken at that instant.
Average speed: The total distance covered by an object divided by the total time taken for the motion.
Relative speed: The speed of an object relative to another object or reference point.
Scalar speed: The magnitude of velocity, expressed in units of length per unit time.
Vector speed: The velocity of an object, expressed as both magnitude and direction.
Radial speed: The component of an object's velocity directed towards or away from the center of rotation.
Tangential speed: The component of an object's velocity in a direction perpendicular to the radial speed.
Escape speed: The minimum speed an object must have to escape the gravitational pull of a planet or other celestial body.
Terminal speed: The maximum velocity an object reaches during freefall due to air resistance.
Sound speed: The speed at which sound waves travel through a medium.
Light speed: The speed at which light travels through a vacuum, approximately 299,792,458 meters per second.
Critical speed: The speed at which an object experiences resonance or instability due to the natural frequency of its motion.
"The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval..."
"The instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero."
"Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion."
"Speed has the dimensions of distance divided by time."
"The SI unit of speed is the metre per second (m/s)..."
"...the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph)."
"For air and marine travel, the knot is commonly used."
"The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299792458 metres per second..."
"Matter cannot quite reach the speed of light, as this would require an infinite amount of energy."
"In relativity physics, the concept of rapidity replaces the classical idea of speed."
"...the magnitude of the change of its position over time..."
"The instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero."
"Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion."
"For air and marine travel, the knot is commonly used."
"The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum."
"Matter cannot quite reach the speed of light, as this would require an infinite amount of energy."
"In relativity physics, the concept of rapidity replaces the classical idea of speed."
"Speed has the dimensions of distance divided by time."
"...the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph)."