a body is thrown from the surface of earth with velocity √gR/2 at some angle from the vertical if the maximum height reached by a body is R/4 , R is the radius of earth, find the angle of projection with vertical

a body is thrown from the surface of earth with velocity √gR/2 at some angle from the vertical if the maximum height reached by a body is R/4 , R is the radius of earth, find the angle of projection with vertical be gaternecvt(s) is'are correct? An aeronaut Earth to Moon WII experience •weightlessness once. a tin unto-rn •ell gradually shrinks maintaining its shape, the gravitational he centre irveaæ. In spheöcS shell. the plot of potential versus distance from centre is continuous. (D) In case *hencal •ell, the plot gravitational field intensity I versus distance from —ntre is at some angle from the vertical. If A is hrown fran the efface earth with vdocity 2 main-un height reached by the body is — . Then ct-oose the correct option(s) (R. = Radius ezt) the vertical is sin-I veo±y at maximum height is v = 10 (C) Ü4e prrzecSo.n frTn the vertical is sin-I 6 {D) veodty at maximum height is zero. d the kiretjc energy required to be given to the satelhte to escape earth's field to the KE requjred to be gjven so that the satellite moves in a Orcuiar orbit just Oxe eat's ünosøere.