A body of mass 100kg falls on the earth ...

A body of mass `100kg` falls on the earth from infinity. Its kinetic energy on reaching the earth is `6.27 xx 10^(n)J`. What is the value of `n`? Given, radius of earth is `6400 km` and `g = 9.8 m//s^(2)`. Air friction is neglected.

`6. 27 xx 10^(9)J`

`6. 27 xx 10^(10)J`

`6. 27 xx 10^(7)J`

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