How to Rearrange the Formula d=Vft-1/2at^2 to Solve for a

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Homework Help Overview

The discussion revolves around rearranging the formula d=Vft-1/2at^2 to isolate the variable a. This involves algebraic manipulation within the context of kinematics.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants explore different algebraic steps to rearrange the formula, with one participant presenting a series of transformations. There is a question regarding the placement of brackets in the final expression for a, indicating a concern about precision in mathematical notation.

Discussion Status

The discussion includes attempts to clarify the correct form of the rearranged equation. Some participants express agreement with the initial manipulation, while others point out potential errors in notation that could affect grading.

Contextual Notes

There is an emphasis on the importance of correct notation in mathematical expressions, as well as a mention of potential consequences in an exam setting. The original poster's steps are acknowledged, but there is a suggestion to include an additional line in the manipulation process.

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Homework Statement



rearrange the formula d=Vft-1/2at^2 to solve for a

Homework Equations



d = Vft-1/2at^2
d+ 1/2at^2 = Vft
1/2at^2 = Vft-d
1/2a = Vft-d / t^2

then does a = 2 (Vft-d / t^2)


The Attempt at a Solution

 
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That is correct.
 
excellent thank you
 
annjolino said:
then does a = 2 (Vft-d / t^2)

Hi annjolino! :smile:

What I expect you meant is right …

but what you've written is wrong …

should be a = 2 (Vft-d) / t^2 …

you'll lose marks in the exam if you get brackets in the wrong place! :wink:

(and you could have missed out the line d+ 1/2at^2 = Vft)
 

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