Review problem. a light string with a mass per unit length of 8.20 g/m has its ends tied to two walls separated by a distance equal to three-fourths the length of the string (fig. p16.30). an object of mass m is suspended from the center of the string, putting a tension in the string. (a) (mg)^1/2(b) 1/4(mg x 1000)^1/2 (c) 1/8(5mg x 1000)^1/2(d) none