Problem $2(30$ pts$)$

If the contact stress required to crush quartz is $\backslash (1,000,000\backslash$mathrm$\{$psi$\}\backslash ),$ what force would have to be applied to the platens in the figure below to crush quartz sand? See Figure $\backslash ($ A $\backslash )$ and $\backslash ($ C $\backslash )$ below.

$($b$)$

$($c$)$