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Efficiency of a screw jack is given by

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+1 vote
in Machine Kinematics by (38.0k points)
Efficiency of a screw jack is given by

(a) tan(α + ɸ)/tanα

(b) tanα/ tan(α + ɸ)

(c) tan(α – ɸ)/tanα

(d) tanα/tan(α – ɸ)

I have been asked this question in a dream while sleeping

This interesting question is from Friction in Journal Bearing- Friction Circle in chapter Friction of Machine Kinematics

1 Answer

0 votes
by (106k points)
The correct option is (b) tanα/ tan(α + ɸ)

The explanation: None.

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