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chingcx
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Homework Statement
A mass follows the path of a cardioid r=1+sinφ with given speed, what is its period?
Homework Equations
The Attempt at a Solution
I attempt to do an integral on polar coordinates to find the distance covered by the mass first.
The integral I derived is
[tex]\int_0^{2\pi} \sqrt{r^{2}+(\frac{dr}{d\varphi})^2}d\varphi[/tex]
A mistake here? Or there are other methods to find the time?
Any help is appreciated.
UPDATE: I figure out the integral, but it is zero (ok, I know it's correct ya), but certainly not something I want.
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