1.

A satellite of mass m revolves around the earth of radius R at a height x from its surface. If g is the acceleration due to gravityon the surface of the earth, the orbital speed of the satellite is:

Answer»

gX
`((gR^(2))/(R+X))^(1//2)`
`(gR^(2))/(R+X)`
`(gR)/(R-X)`

Solution :`v_(0)=SQRT((GM)/(R+x))=sqrt((gR^(2))/(R+x))`
THUS correct choice is (B).


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