This is probably more of a math question, but it pertains to physics.(adsbygoogle = window.adsbygoogle || []).push({});

Today in Classical Mechanics the professor was showing the following,

F . dr= (MV_{2}^2)/2 - (MV_{1}^2)/2

but in great length, one of the steps along the way I did not understand how he did it... it was this:

screw latex, if someone could please post a link to somewhere on the forums that shows how to use latex properly, I can't use it to save my life...

here is the step with good old microsoft:

[PLAIN]http://mynqa.com/Cargo/unk.bmp [Broken]

My questions are, where did the number 2 come from in the denominator? Also, how did he bring in the velocity vector into the derivative like that?

Thanks for any help.

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# Work, Velocity & Force vectors Help

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