The potential energy in an elastic string of force constant K which has been extended by X metres is expressed as by Sunday | May 20 | Physics WAEC | 0 comments A. ½kX² B. kX² C. ½kX D. kX Correct Answer: Option A A. ½kX² Users Also Read These:A body of mass 2kg is suspended from the ceiling of…An elastic material has a length of 36cm when a load…An elastic string of force constant 200N m-1 is…A string of length 4m is extended by 0.02m when a…The energy stored in the spring of stiffness…