Question: Q 1 : a ) Derive the expression for efficiency in terms of t a n for zero collar friction in a square thread; where

Q1:
a) Derive the expression for efficiency in terms of tan for zero collar friction in a square thread; where is the thread coefficient of friction.
b) For =0.10 plot a curve of the efficiency for lead angles 045.
Q 1 : a ) Derive the expression for efficiency in

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