G * m1 * mr * (\( \frac{1}{\sqrt{R^{2} + \frac{R}{2}}} \) - \( \frac{1}{\sqrt{R^{2}}} \))
G * m1 * mr * (\( \frac{\sqrt{R^{2} + \frac{R}{2}}}{R^{2} + \frac{R}{2}} \) - \( \frac{1}{R} \))
G * m1 * mr * (\( \frac{R \cdot \sqrt{R^{2} + \frac{R}{2}}-(R^{2} + \frac{R}{2})}{R \cdot (R^{2} + \frac{R}{2})} \))
mit R kürzen
G * m1 * mr * (\( \frac{\sqrt{R^{2} + \frac{R}{2}}-(R + \frac{1}{2})}{R \cdot (R + \frac{1}{2})} \))