Velocity tells the speed AND what direction it's in.
-- "30 miles per hour" is a speed.
-- "30 miles per hour north" is a velocity.
-- "30 miles per hour east" and "30 miles per hour south" are
the same speed but different velocities.
Distance covred in unit time is called speed
Velocity is the change in displacement in a unit time in a specific direction. Speed is the magnitude of velocity and has no direction. Acceleration is the change in velocity in a unit time.
http://wiki.answers.com/Q/The_difference_of_speed_and_velocity" The difference between speed and velocity is that speed is a scalar quantity(that have only magnitude) and velocity is a vector quantity(that have both magnitude and direction).
The speed of anything is measured in metres per second. The difference between speed and velocity is that velocity is a vector, that is it has direction and well as magnitude. So velocity would be measured in metres per second in a certain direction.
The word speed is distance per unit of time. It is frequently used as a substitute for velocity, and it is in more common usage. But there is a difference between speed and velocity. Velocity has a direction vector associated with it. It's speed + direction. That's usually not a big deal when talking about "regular" stuff, but don't tell a physics teacher that.
The difference between speed and velocity is that velocity is speed with a direction vector associated with it. It's that direction vector that makes them different.Speed is displacement (distance traveled) per unit time. Velocity is displacement (distance traveled) per unit time in a given direction. The "directionality" associated with velocity makes it a vector quantity, while speed is a scalar quantity.The main difference between them in everyday life is that "speed" is usually usedproperly, but "velocity" is usually used Improperly.-- "30 miles per hour" is a speed-- "30 miles per hour north" is a velocity-- "30 miles per hour north" and "30 miles per hour west" are the same speed but different velocities.
Acceleration is a change of velocity (per time unit).Acceleration is a change of velocity (per time unit).Acceleration is a change of velocity (per time unit).Acceleration is a change of velocity (per time unit).
A unit of speed is (any unit of length) divided by (any unit of time). A unit of velocity is any unit of speed, along with a direction.
Velocity is speed, plus an indication of direction. To indicate a velocity, you can indicate a speed (this will logically use units of speed), and a direction.
Velocity includes the information on what direction the speed is pointing. 60 mph north and 50 mph north are different velocities. 60 mph north and 60 mph west are also different velocities. Speed doesn't care what direction it's going. 60 mph north and 60 mph west are the same speed. 60 mph 50 mph are different speeds.
Velocity is speed and its direction. The units of velocity are any unit of speed and any means of indicating a direction.
The SI unit for speed and velocity is meters per second (m/s). Speed is a scalar quantity that represents how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.