Physics

Problem

A rigid disk is initially at rest. Beginning at

t=0

, it experiences a constant angular acceleration of

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

for

4\,\text{s}

, followed immediately by a constant angular acceleration of

-1\,\text{rad/s}^2

for the next

2\,\text{s}

. What is the disk’s angular velocity at

t=6\,\text{s}

? a)

3\,\text{rad/s}

8\,\text{rad/s}

6\,\text{rad/s}

2\,\text{rad/s}