1.

A projectile is projected with velocity \[k{{v}_{e}}\] in vertically upward direction from the ground into the space. (\[{{v}_{e}}\] is escape velocity and \[k

A.             \[\frac{R}{{{k}^{2}}+1}\]
B.             \[\frac{R}{{{k}^{2}}-1}\]
C.             \[\frac{R}{1-{{k}^{2}}}\]  
D.             \[\frac{R}{k+1}\]
Answer» D.             \[\frac{R}{k+1}\]


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