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A rocket is fired from inside a deep min...

A rocket is fired from inside a deep mine, so as to escape the earth’s gravitational field. The minimum velocity to be imparted to the rocket is

A

Exactly the same as the escape velocity of fire from the earth’s surface

B

A little more than the escape velocity of fire from the earth’s surface

C

A little less than the escape velocity of fire from the earth’s surface

D

Infinity

Text Solution

Verified by Experts

The correct Answer is:
B
`V_e=sqrt((2GM)/((R+h)))=sqrt(2g(R+h))`
More than escape velocity of earth’s surface.
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