Question

The rotational kinetic energy of a body is E and its moment of inertia is I. The angular momentum is:

• A. EI
• B.
• C. $\sqrt { 2 \mathrm { EI } }$
• D. E / I.

Answer 1

Answer: (C)

$\sqrt { 2 \mathrm { EI } }$

Answer 2

$E = \frac { L ^ { 2 } } { 2 I }$ ⇒ $L = \sqrt { 2 E I }$