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The '''velocity''' of an object is the rate of change of its [[position]]. If the position of an object is some [[function]] of [[time]], then the velocity is the [[derivative]] of that function:
:''v''(''t'') = d''x''/d''t'',
where ''x'' is the position and ''v'' is the velocity. The velocity is a [[vector]], and its length or absolute value is called the ''speed''. The velocity has dimensions of length / time, and may thus be expressed in meter per second (in scientific usage). In daily life, miles per hour and kilometers per hour are more common units.
[[Category:Physics]]
:''v''(''t'') = d''x''/d''t'',
where ''x'' is the position and ''v'' is the velocity. The velocity is a [[vector]], and its length or absolute value is called the ''speed''. The velocity has dimensions of length / time, and may thus be expressed in meter per second (in scientific usage). In daily life, miles per hour and kilometers per hour are more common units.
[[Category:Physics]]