Question

In the following levers, mark the load, effort, and fulcrum. Also, identify the class these levers belong to and comment on their $\text{MA}$ and $\text{VR}$.

$\left(a\right)$



$\left(b\right)$

Answer 1

$\left(a\right)$ Lemon-squeezer$:$


Since the effort arm is longer than the load arm and the fulcrum lies at one end, the lever belongs to class $\text{II}$ and has a mechanical advantage greater than $1$ and so is the velocity ratio.

$\left(b\right)$ Claw-hammer$:$


Since the effort arm is longer than the load arm and the fulcrum lies in the middle the above lever belongs to class $\text{I}$ lever and has a mechanical advantage greater than $1$ and so is the velocity ratio.