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/s2 and 6400 km respectively. The required energy for this work will be :

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Physics

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Question

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/s² and 6400 km respectively. The required energy for this work will be :

6.4 × 10¹⁰ Joules

6.4 × 10¹¹ Joules

6.4 × 10⁸ Joules

6.4 × 10⁹ Joules

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On surface of earth $U = - \frac{GmMe}{Re}$ mgRe = –6.4 × 10¹⁰ Joule

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