A particle is kept at a distance R above the earth’s surface. What – McqOptions

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1.	A particle is kept at a distance R above the earth’s surface. What is the minimum speed with which it should be projected so that it does not return?
A.	[(GM)/(4R)]1/2
B.	[(GM)/(2R)]1/2
C.	[(G*M)/R] 1/2
D.	[(2GM)/R]1/2
Answer» D. [(2GM)/R]1/2

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