A solid uniform disk of mass and radius has two identical point masses

PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

A solid uniform disk of mass

4.0\,\text{kg}

and radius

0.30\,\text{m}

has two identical point masses, each of mass

0.50\,\text{kg}

, rigidly attached to its rim on opposite sides. The assembly is released from rest and rolls without slipping down a ramp that is

1.2\,\text{m}

high. What is the speed of the center of mass of the assembly at the bottom of the ramp? (a)

4.9\,\text{m/s}

(b)

3.4\,\text{m/s}

(c)

3.8\,\text{m/s}

(d)

4.1\,\text{m/s}