Two solid discs P and Q have the same radius but masses and respectively

PHYSICS · Subjective · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

Two solid discs P and Q have the same radius

R

but masses

2\,\text{kg}

and

3\,\text{kg}

respectively. Both rotate about their central axes with the same angular speed

\omega

. Find the ratio

K_P : K_Q

of their rotational kinetic energies.