The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to
A. $$\frac{{0.75}}{{0.75 + \sqrt {\text{v}} }}$$
B. $$\frac{3}{{3 + {\text{v}}}}$$
C. $$\frac{{4.5}}{{4.5 + {\text{v}}}}$$
D. $$\frac{6}{{6 + {\text{v}}}}$$
Answer: Option B

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