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SPEED
definition - In everyday use and in kinematics, the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time
quantity (scalar or vector) - it is thus a scalar quantity
direction (yes or no) - speed has no direction
formula - The formula for speed is speed = distance ÷ time.
unit of measurement - Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but 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).
VELOCITY
definition - The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion.
quantity (scalar or vector) - scalar quantities
direction (yes or no) - yes. The direction of the velocity vector is simply the same as the direction that an object is moving.
formula - sa picture
unit of measurement - Units of Velocity
The SI (international) units for velocity are m/s (meters per second), but velocity may also be expressed in any units of distance per time. Other units include miles per hour (mph), kilometers per hour (kph), and kilometers per second (km/s).