A particle is kept at a distance R above the earth s surface. What is – 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)]<sup>1/2</sup>
B.	[(GM)/(2R)]<sup>1/2</sup>
C.	[(G*M)/R] <sup>1/2</sup>
D.	[(2GM)/R]<sup>1/2</sup>
Answer» D. [(2GM)/R]<sup>1/2</sup>

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