$[-/1$ Points$]$

OSUNIPHYS$110\mathrm{.}6.$P$\mathrm{.}078.$

A seesaw has length $12\mathrm{.}0$ m and uniform mass $16\mathrm{.}3$ kg and is resting at an angle of $30$ with respect to the ground $($see the following figure$).$ The pivot is located at $7\mathrm{.}8$ m from the end of the seesaw. What magnitude of force $($in N $)$ needs to be applied perpendicular to the seesaw at the raised end so as to allow the seesaw to barely start to rotate?

$$ N

$+$

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