Problem $2$: $(11\backslash \%$ of Assignment Value$)$

Even when the head is held erect, as shown in the figure, its center of mass is not directly over the principal point of support $($the atlanto$-$occipital joint$).$ The muscles at the back of the neck should therefore exert a force to keep the head erect. That is why your head falls forward when you fall asleep in class.

Part $($a$)$

If the head has a weight of $48\mathrm{.}1$ N $,$ calculate the force in units of newtons exerted by these muscles using the information in the figure.

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F$\_\{\backslash$mathrm$\{$M$\}\}=\backslash$square $\backslash$quad $\backslash$mathrm$\{$N$\}$

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