Chapter 7, Problem 39P

GO A force $\stackrel{\to }{F}$= (cx− 3.00 x ² ) $\hat{i}$acts on a particle as the particle moves along an xaxis, with $\stackrel{\to }{F}$ in newtons, xin meters, and c a constant. At x= 0, the particle’s kinetic energy is 20.0 J; at x= 3.00 m, it is 11.0 J. Find c.