Question

19. The formula for the inertia of a rotating disc isme, where Iis inertia, ris the radius of the disc, and m is the mass. Which formulacan be used to determine r, given m and I?

Answer 1

The formula for inertia given by the problem is :

$I=\frac{1}{2}mr^2$

Now given that I and m are provided, the formula in getting the value of r will be :

$2I=mr^2$$r^2=\frac{2I}{m}$$r=\sqrt[]{\frac{2I}{m}}$

That's the answer