A solid disk of mass and radius is free to rotate about its central axis

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

Problem

A solid disk of mass

5.0\,\text{kg}

and radius

0.20\,\text{m}

is free to rotate about its central axis. A

10\,\text{N}

force acts tangentially at its rim. What is the magnitude of the disk’s angular acceleration? (a)

25\,\text{rad/s}^2

(b)

20\,\text{rad/s}^2

(c)

40\,\text{rad/s}^2

(d)

10\,\text{rad/s}^2