aSsuming constant acceleration, and movement along a line, use the formula: vf2 = vi2 + (1/2)at2
(final speed squared equals initial speed squared plus one-half times acceleration times time squared).
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There are 3 formula 1. Final velocity = starting velocity + (acceleration)(time) 2. Final velocity^2 = starting velocity^2 + 2(acceleration)(distance) 3. Distance = (starting velocity)(time) + 1/2(acceleration)(time^2) Use whichever you can use.
v2 - u2 = 2as so that a = (v2 - u2)/2s where u = initial velocity v = final velocity s = distance a = acceleration
Without distance, you have to know time, initial velocity, and acceleration, in order to find final velocity.
Acceleration = Final velocity - Initial velocity / time
You use the information you're given, along with the equations and formulas you know that relate distance, time, speed, and acceleration, to calculate the number you're asked to find. And here's a tip: Chances are that the initial acceleration, the final acceleration, and the acceleration all along the way, are all the same number.