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The energy required for a body of mass 1...

The energy required for a body of mass 1000 kg to escape from the attraction of the earth is (If radius of the earth is 6400 km and `g=10m//s^(2)`)

A

`64xx10^(7)J`

B

`64xx10^(8)J`

C

`64xx10^(9)J`

D

`6400J`

Text Solution

Verified by Experts

The correct Answer is:
c
`"BE "=("GMm")/("R")=(gR^(2)m)/(R)=mgR`
`=10^(3)xx10xx6.4xx10^(6)=64xx10^(9)J.`
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