Max height, freely follwing question

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Homework Help Overview

The discussion revolves around a freely falling object that takes 1.5 seconds to travel the last 30.0 meters before hitting the ground. The original poster seeks to determine the height from which the object fell, noting a specific answer of 32.8 meters but expressing uncertainty about the method to arrive at that conclusion.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need for the original poster to engage with the problem by suggesting they should attempt to outline their thoughts or relevant equations. There is mention of using the equation for velocity and an assumption about the object being released from rest.

Discussion Status

The discussion is ongoing, with participants encouraging the original poster to clarify their thought process and assumptions. Some guidance has been offered regarding the use of equations and the interpretation of the problem, but no consensus has been reached on a specific approach.

Contextual Notes

There is an assumption that the object is released from rest, and the original poster has not provided all necessary details about the initial conditions of the fall. The discussion also highlights the importance of engaging with the problem rather than seeking direct answers.

georgelopez00
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A certain freely falling object requires 1.5s to travel the last 30.0 m before it hits the ground. from what height above the ground did it fall?
The answer is 32.8 m but i don't no how to get it. please help
 
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You have to at least have a go at the question or say what you think you MIGHT DO or perhaps what equations might be relevant... for all I know I might have spent as much time writing this reply as you have spent on the problem
 
loonychune said:
You have to at least have a go at the question or say what you think you MIGHT DO or perhaps what equations might be relevant... for all I know I might have spent as much time writing this reply as you have spent on the problem

i used the equation v=at+inital velocity. i figured the velocity is 0 m/s so i got the inital velocity as 14.7 m\s
 
Let's try to rethink the problem.

You have an object that is released from some height we do not know (32.8m according to your answer).
It travels for some length of time greater than 1.5 seconds.
During the FINAL 1.5 seconds it travels 30m.

You did not state in the question, but I'm assuming that the object is released from REST (i.e. when at the height 32.8m).

Now you know a few different variables in a couple of equations for different parts of the journey. Then it's a matter of solving simultaneous equations.

See this post, a very similar problem:

https://www.physicsforums.com/showthread.php?t=252886
 

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