The angular velocity of the pinion is 200 rpm and that of the gear is 50 rpm. The maximum addendum radius of the larger wheel is 85 mm and the radius of the gear is equal to 75 mm. The pressure angle between the gears is equal to 30°. Find the velocity of sliding at the beginning of the contact.

A) 1289.129 mm/s B) 732.324 mm/s
C) 453.681 mm/s D) 239.238 mm/s

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