Show the process that formed rock she found

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

What is the angular momentum of the bar about the axle?