Two particles, A and B, are in uniform circular motion about a common center. The acceleration of particle A is 4.7 times that of particle B. Particle B takes 2.4 times as long for a rotation as particle A. The ratio of the radius of the motion of particle A to that of particle B is closest to:
A) 2.0
B) 3.8
C)0.82
D)0.51
E)11
aA = 4.7 aB
TB = 2.4 TA
a = mrw^2 = mr(2pi/T)^2
aA/aB = (rA/rB)(TB/TA)^2
4.7 = (rA/rB) (2.4)^2
rA/rB = 0.82
Correct option is (C)
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