$1.$ Calculate I for given D $($use $16\mathrm{.}8$ cm$)$ and weight disk $($use $5$ lbs$).$ Using the literature value of G and a rod of length $0\mathrm{.}8$ m$,$ predict P for one of the materials we will use $($see experiment instructions$)$ and the I you just calculated. Show sample calculations.

$2.$ What trend in P$,$ the period of oscillation, is expected as you change mass, m$,$ of disk in experiment for given rod. What about changing radius of disk, R$?$

$3.$ How do expect shear modulus of nylon $66$ to change $($increase$,$ decrease, or stay same$)$ as glass fibers are added to the matrix. How would you expect this to compare to the shear modulus of the pure glass fibers?

Al $6061-$T$626$ GPa

Brass $39$ GPa

Brass $35-44$ GPa

Nylon $661\mathrm{.}15$ GPa

Glass $19\mathrm{.}6-34\mathrm{.}2$ GPa

e$-$glass fiber $30$ GPa