velocity of impact (counter weighted)

This is the formula for the velocity that will be achieved when object one of mass (`m_1`) is suspended at a height (`h_1`) above the ground counter weighed by a second object of lesser mass (`m_2`). Standard SI units are kilograms (kg) for mass and meters per second (m/s) for velocity. However, there are no constants and the output units can correspond to any appropriate input units. Key words: simple machine, potential energy, pulley