Find velocity of ring B (${\mathrm{V}}_{\mathrm{B}}$) at the instant shown. The string is taut and inextensible:

• A

  $\frac{1}{2}\mathrm{m}/\mathrm{s}$

• B

  $\frac{\sqrt{3}}{4}\mathrm{m}/\mathrm{s}$

• C

  $\frac{1}{4}\mathrm{m}/\mathrm{s}$

• D

  1 m/s