- #1
Math10
- 301
- 0
Homework Statement
Find the equations of the trajectories of y"+y^3=0.
Homework Equations
None.
The Attempt at a Solution
The Undamped Case:
y"+p(y)=0
v(dv/dy)+p(y)=0
integrate
v^2/2+P(y)=C
---------------------------------
So following the formula above:
The answer I got is v^2/2+y^4/4=C, but the answer in the book says v^2+y^4/4=C. What's wrong?