Question

A planet of radius has the same mass density as Earth. Scientists dig a well of depth on it and lower a wire of the same length and of linear mass density into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it in place is (take the radius of Earth  and the acceleration due to gravity of Earth is 10)

A

B

C

D

Hard
JEE Advanced
Updated on : 2022-09-05
Solution
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Correct option is B)


           
Force to keep the wire at rest (F)
             weight of wire

Putting the values and solving we get,

Solve any question of Gravitation with:-
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