Velocity is defined as the rate of change of displacement of a body moving in a straight

line. It is measured in metre per second. Velocity is a vector* quantity. It is denoted by u.

Let s = Distance travelled by a body in a straight line

t = Time taken to travel the distance.

Then velocity of the body =s/t

Mathematically, it can also be written as

Velocity, v = ds/dt

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