A solid disc of mass and radius rotates about its central symmetry axis

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

A solid disc of mass

2\,\text{kg}

and radius

0.50\,\text{m}

rotates about its central symmetry axis. What is its radius of gyration about this axis? (a)

0.25\,\text{m}

(b)

0.71\,\text{m}

(c)

0.35\,\text{m}

(d)

0.50\,\text{m}