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