Question $5$ of $9$

$/10$

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In the figure, two particles, each with mass $m=0\mathrm{.}85kg,$ are fastened to each other, and to a rotation axis at $O,$ by two thin rods, each with length $d=6\mathrm{.}0cm$ and mass $M=1\mathrm{.}3kg.$ The combination rotates around the rotation axis with angular speed $=0\mathrm{.}29ra\frac{d}{s}.$ Measured about $O,$ what is the combination's $($a$)$ rotational inertia and $($b$)$ kinetic energy?

$($a$)$ Number $$ Units

$($b$)$ Number $$ Units $$