# physics equation rearrangement

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#1
how would you rearrange 1/2ke^2 for e?
0
2 years ago
#2
What do you mean

To get it on its own?

Or to find e if you are given other values for other stuff.

To get e on its own I would expect the equation to equal something.

If I am wrong then just ignore this.

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1/2ke^2=1
e^-2/2k=1
e^-2=2k
1/e^2=2k
2k(e^2)=1
e^2=1/2k
e^1=square root (1/2k)

This is if it equals 1 btw, if it doesn't equal something I have no idea.
0
2 years ago
#3
(Original post by i hate my life)
how would you rearrange 1/2ke^2 for e?
Are you sure the equation isn't equal to something? Maybe post a picture of the questions/equations and we can take a better look at it

(Original post by monkeyman0121)
What do you mean

To get it on its own?

Or to find e if you are given other values for other stuff.

To get e on its own I would expect the equation to equal something.

If I am wrong then just ignore this.
0
2 years ago
#4
Are you sure the equation isn't equal to something? Maybe post a picture of the questions/equations and we can take a better look at it

It is not a full answer, as there's could equal something else and maybe equal something far more irritating and hard to rearrange. I just gave an example of how to do it, so they can apply it to harder questions such as ones that have equal to other letters or numbers.
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2 years ago
#5
(Original post by monkeyman0121)
It is not a full answer, as there's could equal something else and maybe equal something far more irritating and hard to rearrange. I just gave an example of how to do it, so they can apply it to harder questions such as ones that have equal to other letters or numbers.
The problem with that equation is that it isn't an equation and is in fact an expression so it isn't possible to rearrange it so it doesn't help you posting a wrong solution. Also, all I was saying is to let OP think about what they can do rather than tell him how to do it.
0
2 years ago
#6
The problem with that equation is that it isn't an equation and is in fact an expression so it isn't possible to rearrange it so it doesn't help you posting a wrong solution. Also, all I was saying is to let OP think about what they can do rather than tell him how to do it.
That is why I wrote the first few lines, to ask him if he is trying to rearrange without it equaling something. I also advised him to ignore the rest of the post if it wasn't.

I would have done something else to help but I was busy at the time and I felt that some quick help was better than not trying. (Needed to go somewhere on short notice).
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#7
(Original post by monkeyman0121)
That is why I wrote the first few lines, to ask him if he is trying to rearrange without it equaling something. I also advised him to ignore the rest of the post if it wasn't.

I would have done something else to help but I was busy at the time and I felt that some quick help was better than not trying. (Needed to go somewhere on short notice).
it was for E = 1/2ke^2 sorry didn't write what it was equal to, my bad.
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2 years ago
#8
Itโs root 2E/k I think not sure as I just dit in in my head
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2 years ago
#9
(Original post by i hate my life)
it was for E = 1/2ke^2 sorry didn't write what it was equal to, my bad.
Now that makes more sense. What do you think you can do here.

The two rules you need to follow are

1) you can perform all 4 operations but you have to do the same thing to both sides of the equals sign
2) if you want to move or cancel a variable on one side of the equation, you do the "opposite" operation on both sides of the equation.
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