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An asteroid of mass m is approaching ear...

An asteroid of mass m is approaching earth, initially at a distance of 10 `R_e` with speed `V_i`. It hits the earth with a speed `v_f(R_e" and "M_e` are radius and mass of earth), then

A

`v_r^2 = v_i^2 + ((2GM)/M_e R) (1 - 1/10)`

B

`v_r^2 = v_i^2 + ((2GM_e)/R_e) (1 + 1/10)`

C

`v_r^2 = v_i^2 + ((2GM_e)/R_e ) (1 - 1/10)`

D

`v_r^2 = v_i^2 + ((2GM)/R_e) (1 - 1/10)`

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