question_answer

The mass of a spaceship is 1000 kg. It is to be launched from the earth's surface out into free space. The value of 'g' and 'R' (radius of earth) are \[10\,m/{{s}^{2}}\] and 6400 km respectively. The required energy for this work will be:                                                                                                                                       [AIEEE 2012]

A)  \[6.4\times {{10}^{11}}\] Joules

B)       \[6.4\times {{10}^{8}}\] Joules

C)  \[6.4\times {{10}^{9}}\] Joules

D)       \[6.4\times {{10}^{10}}\] Joules

Correct Answer: D

Solution :

[d]