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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?