Switching the turntable to 78 rpm, you place your sister's favorite troll doll exactly 15 cm from the spindle. You now switch the turntable off, and it takes 3 seconds to come to rest. 12.2 rev 24. A yo-yo is swung at the end of its string in a horizontal circle. Its angular speed is constant.
Tension provides centripetal acceleration, gravity provides tangential acceleration.
A centrifuge starts from rest, and angularly accelerates to a final speed of 3000 rpm. It then continues to rotate with constant angular speed. As it spun up to speed, its tangential acceleration could not have been constant. As it spun up to speed, its centripetal acceleration could not have been constant. As it spun up to speed, the centripetal acceleration decreased and the tangential increased.