A small box with mass 0.250kg is attached to a string passingthrough a hole in a frictionless, horizonatal surface. The block isoriginally revolving in a circle with a radius of 0.800m about thehole with a tangential speed of 4.00m/s. The string is then pulledslowly from below, shortening the radius of the circle in which theblock revolves. The breaking strength of the string is 30.0N. What is the radius of the circle when the string breaks?