Gravitation Question 132

Question: A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is [KCET (Engg./Med.) 2002]

Options:

A) R/3

B) R/2

C) R/4

D) R/5

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Answer:

Correct Answer: A

Solution:

If body is projected with velocity v [(v<ve)] then height up to which it will rise, [h=Rve2v21] [v=ve2] (given) \ [h=R(veve/2)21=R41=R3]



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