vf=vi+at² simplifying making vi=0, v=at²
t²=v/a
t=√v/atime equals square root of velocity divided by acceleration (or gravity)
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If the velocity is constant, thenDisplacement = (initial velocity) multiplied by (time)
the formula for finding acceleration is final velocity, minus initial velocity, all over time. So if you have the acceleration and initial speed, which is equal to the initial velocity, you must also have time in order to find the final velocity. Once you have the time, you multiply it by the acceleration. That product gives you the difference of the final velocity and initial velocity, so then you just add the initial velocity to the product to find the final velocity.
Use the formula Acceleration = (final velosity - initial velocity)/ time.
Where a = (v-u)/t a is acceleration, v is final velocity u is initial velocity t is time so, u=v-at
Going back to definitions, Velocity is change of distance with time; and acceleration is change in velocity with time. Initially, the velocity is zero, as is the acceleration, BUT the Force of Gravity attracts the falling mass, and causes velocity to appear. But the continued application of the Force of Gravity causes the velocity to increase. And as we know, increase in velocity is acceleration. [space for QED]