Two satellites A and B of the same mass
are orbiting Earth in concentric orbits. The
distance of satellite B from Earth’s center is
twice that of satellite A.
What is the ratio of the tangential speed of
B to that of A?

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  1. Vc = sqrt(µ/r)

    V(A)^2 = µ/r(A)

    V(B)^2 = µ/r(B) = µ/2r(A)

    V(B)^2/(2/V(A)^2 = [µ/2r(A)]/[µr(A)]

    .................= 2

    V(B)/V(A) = sqrt2

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