A circular disk with a diameter of 40 cm rotates uniformly about an axis passing through the center. The disc rotates 2 revolutions every second. Calculate the linear speed, angular speed, and centripetal acceleration of a point A lying on the disk and 10 cm from the edge of the disk?

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.