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## Homework Statement

The original superman leaps into the air to land on an 85.5 m high building. What was his intial velocity?

d = 85.5 m

v2 = 0

v1 = ?

a = 9.8 m/s2 (I'm not sure about this one so I just used acceleration due to gravity)

## Homework Equations

v2 = v1 + 2ad (?)

## The Attempt at a Solution

I'm really not sure what acceleration value to use for this or if I can solve it without using acceleration