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The frictional torque for square thread at the mean radius r while raising load W is given by

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+1 vote
in Machine Kinematics by (38.0k points)
The frictional torque for square thread at the mean radius r while raising load W is given by

(a) T = W.rtan(α – ɸ)

(b) T = W.rtan(α + ɸ)

(c) T = W.rtanα

(d) T = W.rtanɸ

I had been asked this question by my school principal while I was bunking the class.

This intriguing question comes from Friction in Journal Bearing- Friction Circle in division Friction of Machine Kinematics

1 Answer

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by (106k points)
The correct answer is (b) T = W.rtan(α + ɸ)

The explanation: None.

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