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:An elastic string of force constant 200N m-1 is…When an elastic material is stretched by a force,…The mass attached to a string is moving in a…The potential energy in an elastic string of force…A body of mass m = 0.5 kg is suspended by a string…