1/2mv^2 = mgh
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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
momentum = mass x velocity => mass = momentum / velocity
You can't. The mass is irrelevant to velocity. You need the distance.
You cannot. Force = Mass*Acceleration or Mass*Rate of change of Velocity.
You can't. Acceleration is change in velocity. If given a constant velocity, the acceleration is zero.