| 1. | \(-\dfrac{20~Gm}{R}\) | 2. | \(-\dfrac{8~Gm}{R}\) |
| 3. | \(-\dfrac{12~Gm}{R}\) | 4. | \(-\dfrac{16~Gm}{R}\) |
At what height from the surface of earth the gravitation potential and the value of g are and respectively? (Take, the radius of earth as 6400 km.)
1. 1600 km
2. 1400 km
3. 2000 km
4. 2600 km