1. The problem statement, all variables and given/known data An object of mass 0.2 kg is thrown vertically upwards from ground level and reaches a height of 8.0 m. Calculate: the speed with which it must be thrown. 2. Relevant equations Vf2 – Vo2 = 2gH 3. The attempt at a solution Vf2 – Vo2 = 2gH Vf = Final Velocity = 0 (Ball at maximum height) Vo = Initial Velocity. g = 9.8 H =8m 0 - Vo2 = 2 x -9.8 x 8 = -156.8 This is my attempt so far but I'm getting a negative answer, can anyone show me where I'm going wrong?