1. Tetherball In the game of tetherball, a ball is attached to a string that winds around a post , as shown . Neglect any gravitational droop. When 3/4 of the string has wound around the post what is the speed of the ball in terms of its initial speed vo ?3. Ladder A ladder rests on the floor, leaning against a smooth wall , as shown . smooth a) The ladder is stable is 930 min , MS otherwise it slips . Find the coefficient of static friction between the ladder and the floor, MS. b) Compute us from part (a) if Omin = 402. Marbles and coins m A small object (with radius R r