What is the formula for velocity?

The basic formula for average velocity is v = d/t, where v is velocity, d is displacement and t is time. The displacement is the distance traveled during the time, t.

The formula for velocity given constant acceleration is v = u + at, where u is the velocity when the time, t, is equal to 0 and a is the rate of acceleration. The acceleration can be expressed as the change in velocity over the change in time. The instantaneous velocity can be found by taking the derivative of the equation in respect to distance. In this case, velocity and speed are the same, except that velocity is expressed as vector and speed is expressed in scalar form.