A satellite moves in a stable circular orbit round the earth if (where V H , V c and V e are the horizontal velocity, critical velocity and escape velocity respectively)

MHT CET 2023 Physics question

A satellite moves in a stable circular orbit round the earth if (where VH, Vc and Ve are the horizontal velocity, critical velocity and escape velocity respectively)

(A)VH < Vc
(B)VH = Ve
(C)VH = VcCorrect
(D)VH > Vc

Answer: (C)

Solution

For a circular orbit the gravitational force must exactly provide the centripetal force, , which gives the critical (orbital) velocity . So a stable circular orbit requires

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Question ID VK-095293