A disturbing mass m1 attached to the rotating shaft may be balanced by a single mass m2 attached in the same plane of rotation as that of m1, such that (where r1 and r2 are the radii of rotation of m1 and m2 respectively)
A. m1r2 = m2r1
B. m1r1 = m2r2
C. m1m2 = r1r2
D. None of these
Answer: Option B
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