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## Homework Statement

A Ball is thrown upwards. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s2 and maximum height is 7.2 m ,. Neglect air resistance.

## Homework Equations

Vfinal squared = velocity initial squared + 2g times change in y

## The Attempt at a Solution

velocity final squared = velocity initial squared + 2 (-9.8)(7.2)

VF^2= VI^2 + -141.12

what now?/