Two mating involute spur gear of 20° pressure angle have a gear ratio of 2. The number of  teeth on the pinion is 20 and its speed is 250 r.p.m. The module pitch of the teeth is 12 mm.  If the addendum on each wheel is such that the path of approach and the path of recess on  each side are half the maximum possible length, find :  a. The addendum for pinion and gear wheel;  b. The length of the arc of contact;  c. The maximum velocity of sliding during approach and recess. Assume pinion to be the  driver.

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Q: i need the answer quickly

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Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.