The angular velocity of the pinion is 325 rpm and that of the gear is 155 rpm. The number of teeth on the larger wheel is 60 and the module is equal to 7 mm. Addendum is 1.1 times the module. The pressure angle is 20°. Find the velocity of sliding at the beginning of the contact.

A) 1010.858 mm/s B) 1317.858 mm/s
C) 1217.858 mm/s D) 1117.858 mm/s

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