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## Homework Statement

An object is launched upwards with a velocity of 25 m/s. At what time (or times) will the object be located twenty meters above the ground?

## Homework Equations

## The Attempt at a Solution

I started off with the following variable list:

Xo=0 Vo=25

X=0 V=0

t=? a=-9.8

Which seems very off to me.

When trying to solve I got 2.55 seconds. But is there another time where it reaches 20m?

How do you solve this?

Thanks!