Question

a body is projected vertically upward with a speed of root over GM/R the body will attend a height of

Answer 1

v^2 - u^2 = 2as 
Taking downwards as negative we get, 
v = 0  
u = -√gR 
s = ? 
a = -g 
i.e, 0-(-√gR)^2=2*-gs 
-gR=-2gs 
s=R/2