The mass of the earth is 6 × 1024 kg and that of the Moon is 7.4 × 1022 kg. The constant of gravitation G is 6.67 × 10-11 Nm2 kg-2. The potential energy of the system is – 7.79 × 1028J. The mean distance between the Earth and Moon is …… metre.
A. 3.80 × 108
B. 3.37 × 108
C. 7.60 × 108
D. 1.90 × 102
Answer:A
The mass of the earth is 6 × 1024 kg and that of the Moon is 7.4 × 1022 kg. The constant of gravitation G is 6.67 × 10-11 Nm2 kg-2. The potential energy of the system is – 7.79 × 1028J. The mean distance between the Earth and Moon is …… metre.
A. 3.80 × 108 B. 3.37 × 108 C. 7.60 × 108 D. 1.90 × 102