A particle is projected from the surface of earth with velocity equal to its escape velocity , at 45^(@) with horizontal . What is the angle of its velocity with horizontal at height h= R . (Here horizontal at some point means a line parallel to tangent on earth just below that point . )

A particle is projected from the surface of earth with velocity equal

1.	A particle is projected from the surface of earth with velocity equal to its escape velocity , at 45^(@) with horizontal . What is the angle of its velocity with horizontal at height h= R . (Here horizontal at some point means a line parallel to tangent on earth just below that point . )
Answer» `30^(@)` `60^(@)` `cos^(-1) ((1)/(3))` `cos^(-1) ((1)/(4))` ANSWER :B

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A particle is projected from the surface of earth with velocity equal to its escape velocity , at 45^(@) with horizontal . What is the angle of its velocity with horizontal at height h= R . (Here horizontal at some point means a line parallel to tangent on earth just below that point . )

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