Rearranging an SUVAT Equation: Solving for Time

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Homework Help Overview

The discussion revolves around rearranging a SUVAT equation to solve for time (t). Participants are engaging with algebraic manipulation within the context of kinematics.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to rearrange the equation and are discussing the correct algebraic steps needed. There are questions about handling negative factors and the implications of multiplication in the equation.

Discussion Status

Some participants have offered guidance on the algebra involved, while others have noted the need for a review of basic algebra concepts. The discussion is ongoing, with multiple interpretations of the problem being explored.

Contextual Notes

There are indications that some participants may be struggling with foundational algebra skills, which could impact their ability to manipulate the equation effectively.

Physics55555
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Hello everyone,

Please can someone help me rearrange this equation to make t the subject:

upload_2016-4-18_18-35-35.png
Relevant equations:
upload_2016-4-18_18-35-45.png
My attempt at a solution:
upload_2016-4-18_18-36-25.png


Thank you all for you help
 
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Physics55555 said:
Hello everyone,

Please can someone help me rearrange this equation to make t the subject:

View attachment 99318

Relevant equations:
View attachment 99319
My attempt at a solution:
View attachment 99320

Thank you all for you help
Not such good Algebra.
0.5 is a factor. It's not added or subtracted.

You start with
##s=-\frac12 at^2 ##

Multiply both sides by ##\displaystyle \ -\frac2a\ ##
 
You probably should take a few minutes to review basic algebra before going any further with physics. :wink:
 
lol, thanks guys. It's been years since I've done this kind of stuff! I've totally forgotten what to do when there's a negative number involved.

Appreciate the help @SammyS and @SteamKing
 
Physics55555 said:
lol, thanks guys. It's been years since I've done this kind of stuff! I've totally forgotten what to do when there's a negative number involved.

Appreciate the help @SammyS and @SteamKing
You're welcome.

It's more a matter that the numbers are all multiplied, rather than that there is a negative.
 

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