The radius in kilometer to which the present radius of earth ( R = 6400   km ) to be compressed so that…

The radius in kilometer to which the present radius of earth (R=6400 km) to be compressed so that the escape velocity is increased 10 time is _______.

Solution

Ve=2GmR …1

10 Ve=2GmR' …2

∴10=RR'

⇒R'=R100=6400100=64 km

Asked in: JEE Main 2021 (17 Mar Shift 1)

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