Learn about new technologies!

What is the correct answer?


Maximum efficiency of a screw jack for the angle of friction θ, is

A. sin θ/(1 + sin θ)

B. (1 - sin θ)/sin θ

C. (1 + sin θ)/(1 - sin θ)

D. (1 - sin θ)/(1 + sin θ)

Please do not use chat terms. Example: avoid using "grt" instead of "great".