Question

A wheel of mass $15kg$ has a moment of inertia of $200kg-m^2$ about its own axis, the radius of gyration will be

• A. $3.6m$
• B. $4m$
• C. $4.6m$
• D. $1.21m$

Answer 1

Answer: (A)

As we know
$I=M{k}^2\Rightarrow \sqrt{\frac{I}{M}}$
$=K=\sqrt{\frac{200}{15}}$
$=\sqrt{\frac{40}{3}}$
$=\sqrt{13.33}=3.65m$