Concept #1: Equations of Rotational Motion
Example #1: Rotational velocity of disc
Practice: A tiny object spins with 5 rad/s around a circular path of radius 10 m. The object then accelerates at 3 rad/s2 . Calculate its angular speed 8 s after starting to accelerate.
BONUS: Calculate its linear displacement in the 8 s.
Practice: The turntable of a DJ set is spinning at a constant rate just before it is turned off. If the turntable decelerates at 3 rad/s2 and goes through an additional 30 rotations before stopping, how fast (in RPM) was the turntable initially spinning?
BONUS: How long (in seconds) does the turntable take to stop?