Body is projected vertically upward from the surface of the earth with a velocity equal to half ...

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Body is projected vertically upward from the surface of the earth with a velocity equal to half the escape velocity. If \( \mathrm{R} \) is radius of the earth, the maximum height attained by the body is :-
(1) \( \frac{R}{6} \)
(2) \( \frac{\mathrm{R}}{3} \)
(3) \( \frac{2}{3} \mathrm{R} \)
(4) \( \mathrm{R} \)
\( \mathrm{W} \)
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