A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 2.20 m to x = 6.20 m, calculate the following.
(a) the work done by this force
(b) the change in the potential energy of the system
(c) its kinetic energy of the particle at x = 6.20 m if its speed is 3.00 m/s at x = 2.20 m