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Homework Statement
a disk rotates with constant angular accel. the initial angular speed of the disc is 2pie rad/s. After the disk rotates through 10pie rad, the ang speed is 7pie rad/s.
Homework Equations
a. what is the mag of the angular accel?
The Attempt at a Solution
alpha=delta omega/delta time
omega=delta theta/delta time
etiher or both?