A 3.0 kg rock is lifted above the ground 7.3 meters and released. What velocity is reached by the rock just before it hits the ground?

I can tell you that the weight of gravity is 9.8 m/s. If there is no friction involved in the equation, you have an initial velocity of 0, correct? So workout the equation now. 

I can tell you that the weight of gravity is 9.8 m/s. If there is no friction involved in the equation, you have an initial velocity of 0, correct? The weight of gravity on earth is 5.972 x 10^24.