the final velocity assuming that the mass is falling and that air resistance can be ignored but it is acceleration not mass that is important (can be gravity)
final velocity is = ( (starting velocity)2 x 2 x acceleration x height )0.5
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Without distance, you have to know time, initial velocity, and acceleration, in order to find final velocity.
Use the formula Acceleration = (final velosity - initial velocity)/ time.
1/2mv^2 = mgh
The final velocity is (the initial velocity) plus (the acceleration multiplied by the time).
If you have the mass, you can find the acceleration from Newton's Second Law, a=F/m where a is the acceleration, m is the mass, and F is the force. Then the velocity is given by the standard formula v=vo+at where v is the final velocity, vo the velocity at t=0, probably 0 in your case. If so v=at.