\(\overline{y}=\frac{R\left(-\cosθ\right)\ \frac{2\pi/3}{-2\pi/3}}{\left(θ\right)\ \frac{2\pi/3}{-2\pi/3}}\)
\(\frac{\left(300\right)\left(0.5-0.5\right)}{\frac{4\pi}{3}}=\frac{3\left(0\right)\left(300\right)}{4\pi}=0\)
El resultado es 124.04 mm