Masses \(B_{1}, B_{2}\) and \(9 \mathrm{~kg}\) are attached to a shaft in parallel planes as shown in the given Fig.44. If the shaft is rotating at \(100 \mathrm{rpm}\), the mass \(B_{2}\) is

(a) \(3 \mathrm{~kg}\)

(b) \(6 \mathrm{~kg}\)

(c) \(9 \mathrm{~kg}\)

(d) \(27 \mathrm{~kg}\).

9 kg 50 cm shaft 50 cm 100 cm 50 cm 50 cm B2 B Fig.44