- #1
tomwilliam
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Homework Statement
Find the region of motion of a particle in a system following a potential energy function of:
U(x)=ax4+bx3+cx + d
and total energy of E=3
I know the values of a, b, c and d.
Homework Equations
Etotal=U(x)+Ekin
The Attempt at a Solution
I know that I can the turning points are where speed is zero, and therefore kinetic energy is zero, so:
Etotal-U(x)=0 represents the boundary values of x.
So
3=ax4+bx3+cx + d
I've graphed the functions and can see the rough value of x which corresponds to the region of motion, but I need to provide an exact answer. I am not expected to solve quartic equations, so there must be a way of simplifying the potential energy function. I could differentiate it, but that's not really the solution I'm after. I could extract the factor of x (passing d over to the other side) but I don't know if I can remove the case where x=0.
Any help much appreciated
Thanks
Homework Statement
Homework Equations
The Attempt at a Solution
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