- #26

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- Thread starter thharrimw
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- #26

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- #27

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Calculus based physics sounds easier.

- #28

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I don't know much about cal. based physics but, I'm guessing it comes from 1/2 a^2 +mSay what? That's the definition of acceleration. How does it follow from Newton's second law?

- #29

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That makes absolutely no sense. And the units don't match up either.I don't know much about cal. based physics but, I'm guessing it comes from 1/2 a^2 +m

- #30

cristo

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I think D H is talking about this version of Newton's second law [tex]F=\frac{d(mv)}{dt}[/tex]. I'm not sure how [itex]\ddot{x}=a[/itex] comes from this though; perhaps I'm missing something!Say what? That's the definition of acceleration. How does it follow from Newton's second law?

- #31

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For instance say we wanted to find a velocity of a function at a certain time, with only knowing it's position at any given time. Without calculus the best we can do is approximate this. But since a velocity is just a change in position, if we find the change in position over an infinitely small time interval we can find the actual velocity of an object. This would be an example of differentiation.

An example of integral calculus would be something like this. Say you have a rigid rod and you wanted to calculate the force of gravity the rod exerts on another object at sometime. Well to do this we need to chop the rod up into finitely small parts and find the force for all of these parts, then sum them together to get the total force. Without calculus goodluck summing up the force of an infinite number of pieces of a rod.

Also you can have differential equations (Just shows how a particular function is changing) and you might want to calculate a value of the function at a particular point. A good example of this would be a spring that is dampened.

- #32

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calc based physics is what science/engineering majors take.

simple as that.

- #33

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Oh the plus should be a x and the m should be a v. I just did some basic antidifferentiation.That makes absolutely no sense. And the units don't match up either.

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