Two satellites A and B of the same mass are going around 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?
A. 1/2
B. 1/2^1/2
C. 1
D. 2^1/2
E. 2

Two satellites A and B of the same mass are going around 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? A. 1/2 B. 1/21/2 C. 1 D. 21/2 E. 2