@mathprofbrony  
To the second equation - multiplying by mass is overrated. I find more often it’s velocity I’m looking for.
 
My guess is she’s just showing it to them, first. Or it’s derived on the left side of the board. I dunno :q

@Lawful Girly  
I realize

@Registered Anon  
That’s a joke, son.

@Lawful Girly  
The problem did not state that he already had 145. It stated that he had 60 and gave 37, and 60-37=23.

@Registered Anon  
Wrong. He already had 145, he just wanted 60 more when he bought them.  
Lateral thinking, whooo.

@Factory Yoshi  
23.

@Trilby Pony  
Pablo bought 60 apples and gave John 37  
How many apples did Pablo have left?

@SeraphimDawn  

Math is a more potent drug to Sweetie Belle than meth.

Twilight Time?

“The other Twilight was more fun.”  
“What other Twilight?”  
“Nothing!”

@FanOfMostEverything  
Or it could be for the “Anon-a-miss” Incident.

Sweetie Belle: I like science!!

I think Sweetie is mummified there.

@Background Pony #71FE  
nerds are sexy!!! :3

@SeraphimDawn  
She’s just tired. They all are. They’re tired because Twilight’s science lecture is going on for over 6 hours. It’s not necessarily because they’re not interested in physics (Or any science), but because they can’t handle such a long lecture.

neeerrrddddd!

id be too distracted by Twilight in a lab coat to learn! :3 purrs

@mathprofbrony  
Headcanon: This is part of some court-ordered community service after an entirely innocent misunderstanding that may or may not have involved certain high energy isotopes and a certain horse statue in front of a certain high school. Twilight is following the letter of her punishment rather than the spirit, so that she can get back to doing something important, that those fools could never even begin to understand. They laughed at her at the university. Laughed! But she’ll show them! She’ll show them all!

In a way, this reminds me of a panel from Marvel’s relaunch of Hulk in the comic form.  
Leucenstern: Don’t you sleep?  
Doc Green/Hulk: No. Not anymore. And especially not when there’s this much science to do.

Apple Bloom looks totally sick. o.O

Episode where the CMC make a clever project that’s useful for stuff that Applejack insists they enter to the School Science Fair, but Science Twilight finds them and tries to give them advice to “improve” it. They make it into some grand contraption that destroys the fair and a potato lamp wins and a lesson about the importance of letting people learn to solve problems on their own is learned.

Damn…  
What’s Sweetie on?

Basic physics of motion. Position (and initial position), velocity (and initial velocity), acceleration, and time.
 
The first and third are essentially the same equation with an error – s and x both mean displacement, or position – and v in the first equation should be v_0. (Psst, Twi: v(t) is ambiguous if you’re multiplying v by t, because it looks like function notation. And if you mean v(t), you’re wrong; just check your units.) It says that your position x is your starting position, x_0, plus the distance you would have traveled at your initial velocity over the interval, v_0 t, plus the distance covered by an object accelerating from a standstill with constant acceleration, 1/2 a t^{2.
 
The second equation makes more sense if you multiply through by 1/2 m, which then says that kinetic energy (1/2 m v}2) equals initial kinetic energy 1/2 m v_0^2, plus ma(x-x_0). Force is m*a, and force times distance is the work done, which is the change in kinetic energy.
 
Pedagogically, Twi should realize at this point that she’s lost her audience and should either take a break or at least change up the lesson mode, such as turning to some practice.