- #1

1irishman

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## Homework Statement

While on planet X, an object is thrown vertically upward with an initial velocity of 5m/s. If this object returns to the point of release in 3s, what is the acceleration of a free falling object on this planet?

## Homework Equations

a=vf-vi/t

## The Attempt at a Solution

0-5/3

= -1.6m/s^2

The answer is -3.3m/s^2 in the book...i don't understand how they arrived at that?