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 :

The mass of a spaceship is 1000 kg. It is to be launched from the eart

1.	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 :
Answer» `6.4xx10^(10)` joules `6.4xx10^(11)` joules `6.4xx10^(8)` joules `6.4xx10^(9)` joules SOLUTION :`w=0-(-(GM_(m))/(R ))=(GM_(m))/(R )` `=GR^(2)xx(m)/(R )=MGR` `=1000xx10xx6.4xx10^(6)` `=6.4xx10^(10)J` So, correct choice is (a).

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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 :

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