Q. Two particles A and B are moving in uniform circular motion in concentric circles of radius $r_A$ and $r_B$ with speed $v_A$ and $v_B$ respectively. The time period of rotation is the same. The ratio of angular speed of A to that of B will be :
A) $r_A : r_B$
B) $v_A : v_B$
C) $r_B : r_A$
D) 1 : 1
Explanation
[Solution] $\omega = 2\pi/T$; equal periods give equal angular speeds. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.