Acceleration of free falling object on planet X

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Homework Help Overview

The problem involves the motion of an object thrown vertically upward on planet X, with a focus on determining the acceleration of free-falling objects based on its return time to the original release point.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate acceleration using the formula for average acceleration but questions the discrepancy between their result and the book's answer. Participants discuss the time taken to reach maximum height as a critical factor in the calculation.

Discussion Status

Participants are actively engaging with the problem, clarifying concepts related to the motion of the object. Some guidance has been offered regarding the time to reach maximum height, indicating a productive direction in the discussion.

Contextual Notes

There is a noted difference between the original poster's calculation and the book's answer, which raises questions about the assumptions made in the problem setup.

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?
 
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Hi 1irishman, welcome to PF.
vf is zero when the object reaches the maximum height.
What is the time taken by the object to reach that point?
 
1.5s
 
thank you rl...i see now.
 

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