Question

Given : Load = 50 kgf Load arm = 30 cm Effort arm = 1.20m What will be the Mechanical advantage ? (equation must be shown)

Answer 1

Givens.

• Load = 50 kgf

,

• Load arm = 30 cm

,

• Effort arm = 1.20m

The mechanical advantage formula is

$MA=\frac{F_{out}}{F_i}$

It's the ratio between the forces involved.

$MA=\frac{Effort}{Load}$

However, we can use the distances to find the same ratio about the mechanical advantage.

$MA=\frac{120\operatorname{cm}}{30\operatorname{cm}}$

Observe that we use 1.20 meters as centimeters because we need both distances with the same units.

$MA=\frac{120}{30}=4$

Therefore, the mechanical effort is about 4, that is, the point where the effort is made represents 4 times the load.