Question

Which class of lever has the mechanical advantage always more than 1? Give an example.

Answer 1

The mechanical advantage of lever is equal to the ratio of effort arm to the load arm.
𝑀𝑒𝑐ℎ𝑎𝑛𝑖𝑐𝑎𝑙 𝑎𝑑𝑣𝑎𝑛𝑡𝑎𝑔𝑒 𝑜𝑓 𝑙𝑒𝑣𝑒𝑟
$=\frac{Effortarm}{Loadarm}$

For, 𝑀.𝐴. >1
𝐸𝑓𝑓𝑜𝑟𝑡 𝑎𝑟𝑚 >𝐿𝑜𝑎𝑑 𝑎𝑟𝑚
In class II levers the fulcrum is at one end and the load is closer to the fulcrum. Thus, the effort arm is always longer than the load arm. Hence, the mechanical advantage of class II lever is always more than 1.