What is the formula for final velocity that has time in it?

[∞infinite∞]

Hi,

I'm studying for my final exam in Physics tomorrow (doing a review packet) but I keep forgetting the equation/formula needed to find final velocity (not the one with the distance, but the one with time). I don't have most of my notes as my teacher keeps folders of our work and notes at school... and I can't find it on Google.

Please help ASAP it's 11:20 PM here, my eyes are killing me and I want to get an A on the exam...

Thanks in advance.


PS: I think it starts with "vf^2= ... at" ?

 

[Vagn]

There isn't one for v^2 involving t, the equations for the final velocity are

$v = u + at$

and

$v^2 = u^2 + 2as$

where$u$ is the initial velocity and $v$ is the final velocity.

 

[zgozvrm]

Although Vagn is correct, you could say that

$${V_f}^2 = {V_i}^2 + 2a \left( \frac{V_i + V_f}{2} \cdot t \right)$$


but, ultimately, this simplifies to:

$$V_f = V_i + at$$