Question

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

Answer 1

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

∴ Clockwise moment = Anti-clockwise moment

∴ b × L = a × 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"`