an astronaut on a space station conducts a spring experiment. The spring has a natural length of .2 m. A ball, which may be considered to be a solid sphere of radius r, is attached to one end of the spring. The spring is held at the other end, and the ball is whirled around at a tangential speed of 3.0 m/s. The spring remains approximately parallel to the floor and is observed to stretch by .010 m. When the astronaut returns to earth, how much would the same spring-ball system stretch if it were allowed to hang vertically from the ceiling?