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The mass of a spaceship is 1000kg. It is...

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

A

`6.4xx10^(10)J`

B

`6.4xx10^(11)J`

C

`6.4xx10^(8)J`

D

`6.4xx10^(9)J`

Text Solution

Verified by Experts

The correct Answer is:
A
`PE_(i)+KE_(i)=PE_(f)+KE_(f)implies-mgR+KE_(i)=0+0KE_(i)=+mgR=1000xx10xx6.4xx10^(6)`
work done `=6.4xx10^(10)J`
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