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Longitudinal Stress

A sun wheel o...

Question

A sun wheel of 40 teeth drives a ring gear of 100 teeth through a pinion. The number of teeth on the pinion is

A

60

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B

30

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C

40

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D

None

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Solution

The correct option is B 30

$R_{R} = R_{S} + 2 R_{P}$

$z_{R} = z_{S} + 2 z_{P}$

$100 = 40 + 2 z_{p} \Rightarrow z_{P} = 30$

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