Moment of inertia from rotational kinetic energy and angular momentum

1. A.
   $\frac{x^{2}}{2y}$
2. B.
   $\frac{y^{2}}{2x}$
3. C.
   $\frac{x}{2y}$
4. D.
   $\frac{y}{2x}$

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1. A.
   $\dfrac{x}{2y}$
2. B.
   $\dfrac{y}{2x}$
3. C.
   $\dfrac{x^2}{2y}$
4. D.
   $\dfrac{y^2}{2x}$

Tap an option to check your answer.