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in Farm Machinery by (38.9k points)
In an epicyclic gear train, one arm carries two wheels A and B having 25 teeth and 35 teeth respectively. If the arm rotates at 100 rpm in clockwise direction about centre of wheel A which is fixed, then speed of wheel on its own axis will be?

(a) 141 rpm

(b) 151 rpm

(c) 161 rpm

(d) 171 rpm

I have been asked this question in my homework.

I would like to ask this question from Mechanical Power Transmission in section Mechanical Power Transmission of Farm Machinery

1 Answer

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by (243k points)
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Best answer
Correct option is (d) 171 rpm

For explanation: \(\frac{NA-Na}{NB-Nb}=\frac{-TB}{TA} \)

\(\frac{0-100}{NB-100}=\frac{-35}{25} \)

-2500 = -5 NB + 3500

NB = 171 rpm.

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