Suppose that you were to tie a heavy metal washer to one end of a string, hold the string by the other end, and whirl it in a horizontal circle above your head. Pay close attention to where your hand would be and to where the washer would be as you speed up the rotation. Ignore air resistance.

(a) Draw the motion of your hand and the motion of the washer. At a given instant, draw the location of the washer and your hand and the string between them.

(b) As you speed up the rotation, what force is responsible for the acceleration of the washer? Is there a tangential component to this acceleration? A radial component?

(c) When the washer achieves some given rotational speed, you cease increasing that speed. Describe the motion of your hand now.