24. For a particular nonlinear spring, the relationship between the magnitude of the applied force F and the resultant displacement x from equilibrium is given by the equation F=kx2. What is the amount of work done by stretching the spring a distance xo ?
(A) kxo3
(B) 21kxo
(C) 21kxo3
(D) 1/3kxo2
(E) 1/3kxo3
(A) kxo3
(B) 21kxo
(C) 21kxo3
(D) 1/3kxo2
(E) 1/3kxo3