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razgriz129
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Homework Statement
If I was given the potential energy equation
[tex]U(x)=4x^2[/tex]
How would I find the equation for position vs time? I know the graph for position vs time for this equation is a sin curve because the book tells me so.
[itex]v = 0 [/itex] and [itex]x = 0 [/itex] when [itex]t = 0 [/itex]
Homework Equations
[tex]\frac{d}{dx} U(x) = -F(x)[/tex]
The Attempt at a Solution
Taking the derivative of the potential energy equation would yield an equation of force. [tex]-F = 8x [/tex]
Using Newton's second law, we get: [tex]ma = -8x [/tex]
Replace acceleration with velocity and we get: [tex] m \frac{dv}{dt} = -8x [/tex]
I know I would integrate here twice somehow to find position in terms of time, but I'm not entirely sure how. In addition, I don't see how this position equation would have a sin function, as the book shows it should. I was hoping to find a way to solve this or learn a different approach here.
Thanks in advance.
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