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**1. Homework Statement**

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. Homework Equations**

Vf

^{2}– Vo

^{2}= 2gH

**3. The Attempt at a Solution**

Vf

^{2}– Vo

^{2}= 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?