Write the principle used in beam balance and define Mechanical Advantage.

Explanation

(i) The principle for beam balance used for wrighing goods with the condition `d_(1) = d_(2) , F_(1) = F_(2)`
`therefore" "(F_(1))/(F_(2)) = (d_(2))/(d_(1))`
(ii) If `F_(1)` is the load and `F_(2)` is our effort, we get advantage when, `d_(1) gt d_(2)`. This implies that `F_(1) gt F_(2)`. Hence, we could lift a large load with small effort. The ratio `((d_(2))/(d_(1)))` is called mechanical advantage of the simple lever. The pivoted point is called fulcrum.
Mechanical Advantage `(MA) = (d_(2))/(d_(1))`