Question

The mechanical advantage of a machine is 2. It is used to raise a load 15 𝑘𝑔𝑓. What effort is needed?

Answer 1

Given,
Load $\left(L\right)=15kgf$
Mechanical advantage $(M.A.)=2$
Effort $\left(E\right)=?$
𝑀𝑒𝑐ℎ𝑎𝑛𝑖𝑐𝑎𝑙 𝑎𝑑𝑣𝑎𝑛𝑡𝑎𝑔𝑒$=\frac{Load}{effort}$
$effort=\frac{Load}{M.A}$
$effort=\frac{15kgf}{2}$
$=7.5kgf$

Hence, the effort needed will be 7.5 𝑘𝑔𝑓