Velocity
rate of change of position
Velocity is a physical quantity that represents the rate at which an object changes its position. It is a vector quantity because it has both magnitude and direction. Velocity is commonly measured in meters per second (m/s) or in any unit of length per unit of time.
Mathematically, velocity can be calculated by dividing the change in displacement (Δx or Δy) of an object by the change in time (Δt) during which the displacement occurred. This can be expressed as:
Velocity (v) = Δx /Δt
Where Δx is the displacement of an object and Δt is the time taken for the displacement.
Velocity can be positive, negative or zero depending on the direction of motion. A positive velocity indicates that the object is moving in the positive direction while a negative velocity shows that the object is moving in the negative direction. A zero velocity occurs when the object is not changing its position or is at rest.
Velocity can also be used to calculate other physical quantities such as acceleration, momentum and kinetic energy. It is an essential concept in physics and is used in various fields such as engineering, sports, and aviation among others.
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