Calculate Mecahnical Advantage Of Lever Shown In Figure

(i) Calculate the mecahnical advantage of the lever shown in figure. (ii) How do you define mechanical advantage of a machine?

Answers:

(i) Clockwise moment = b x L; and Anti-clockwise moment = a x E

 ∴ Clockwise moment = Anti-clockwise moment

∴  b x L = a x E

Or L/E = a/b

(ii) Mechanical advantage is the ratio of the load lifted to the effort applied.

M.A = L/E = a/b