Question

In a lever, fulcrum is at one end at a distance of $30cm$ from the load and effort is at the other end at a distance of $90cm$ from the load. Find the mechanical advantage of the lever.

Answer 1

Load arm:
Distance between fulcrum and load = 30 cm

Effort arm:
Distance between fulcrum and effort
= 30 cm + 90 cm
= 120 cm

Mechanical advantage of lever:
M.A = $\frac{Effortarm}{Loadarm}$= $\frac{120}{30}$= 4

Hence, mechanical advantage for given liver is 4.