2(iii)
A lever is shown below.
(a) Identify the type of lever.
(b) Calculate its mechanical advantage.
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(a) It is a class III lever.
(b) Mechanical advantage = $\frac{\text{effort arm}}{\text{load arm}}$ = $\frac{0.1}{0.1 + 0.4}$
$$\begin{aligned}= \frac{0.1}{0.5} \\[1em] = \frac{1}{5} \\[1em] = 0.2\end{aligned}$$