velocity formula....

[Katie]

could anyone tell me the formula for velocity?
and acceleration?

thanks,
Katie

[arildno]

What do you mean??
If x(t) is a particle's position at time "t", then the velocity of the particle, v(t), is given by:
v(t)=\frac{dx}{dt}
That is, the velocity of the object is the rate of change of the position.

Similarly, acceleration, a(t) is the rate of change of velocity, that is:
a(t)=\frac{dv}{dt}=\frac{d^{2}x}{dt^{2}}
Was this what you were after?

[Dooga Blackrazor]

Acceleration = (Initial Velocity x Final Velocity) divided by time, or
a = (vf-vi) divided by t

Velocity = d/t or distance divided time.

However since velocity is a vector quantity (meaning it has magnitude(size), and direction) the d/t doesn't provide you with direction. Depending on the level of physics your doing, you might not be required to have a direction with velocity.

[nolachrymose]

Velocity is equal to displacement (a vector, as opposed to distance, a scalar) over time. Speed is equal to distance over time.

[Tom McCurdy]

\Delta=change in

Formula for Average Velocity and Acceleration

<Velocity> = \frac{\Delta distance}{\Delta time}

<Acceleration> = {\frac {\Delta Velocity}{\Delta time}}

[robphy]

Change "velocity" to "average-velocity". :wink:
Change "acceleration" to "average-acceleration". :wink: :wink:

[Tom McCurdy]

true

I was assuming you weren't talking about instanious velocity or acceleration