Two satellites A and B go round a planet in circular orbits having radii 4R and R respectively If the speed of satellite A is 3V, then speed of satellite B is
(A) (3V / 2)
(B) (4V / 2)
(C) 6V
(D) 12v
Correct option: (C) 6V
Explanation:
V ∝ (1 / √r)
(VB / VA) = √(rA / rB)
given : rA = 4R
rB = R, VA = 3V
VB = VA √(4R/R)
VB = 2VA
VB = 6V
