Question

A disc of moment of inertia 2 kg m2 revolving with 8 radian/sec, is placed on another disc of moment of inertia 4 kg m2 revolving 4 radian/sec. What is the angular frequency of composite disc?

• A. $\frac {16}{3}\ \text {rad/sec}$
• B. $\frac {16}{5}\ \text {rad/sec}$
• C. $4\ \text {rad/sec}$
• D. $\frac {3}{16}\ \text {rad/sec}$

Answer 1

Answer: (A)

$\frac {16}{3}\ \text {rad/sec}$

Answer 2

The correct option is (A): $\frac {16}{3}\ \text {rad/sec}$.