GravitationHard

Question

A small ball of mass ′m′ is released at a height ′R′ above the Earth surface, as shown in the figure. If the maximum depth of the ball to which it goes is R/2 inside the Earth through a narrow grove before coming to rest momentarily. The grove, contain an ideal spring of spring constant K and natural length R, the value of K is (R is radius of Earth and M mass of Earth)

Options

A.
B.
C.
D.

Solution

By energy conservation
Ki + Ui = Kf + Uf
0 -


K =

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