1. | \(2\) km/s | 2. | \(2\sqrt2\) km/s |
3. | \(2(\sqrt2-1)\) km/s | 4. | \(2(\sqrt2+1)\) km/s |
1. | \(\dfrac{Rc^2}{G}\) | 2. | \(\dfrac{Rc^2}{2G}\) |
3. | \(\dfrac{2Rc^2}{G}\) | 4. | \(\sqrt2\dfrac{Rc^2}{G}\) |
1. | \(11.2\sqrt2~\text{km/s}\) | 2. | zero |
3. | \(11.2~\text{km/s}\) | 4. | \(11.2\sqrt3~\text{km/s}\) |