FIGURE 8-10 a 2

FIGURE 8-10 A 2.0 kg mass is moving along the x axis. The potential energy curve as a function of position is shown in Figure 8-11. The system is conservative. There is no friction.
-Refer to Figure 8-10. If the speed of the object at the origin is 4.0 m/s, what will be its speed at 7.0 m along the +x-axis?

A) 4.0 m/s
B) 4.1 m/s
C) 4.4 m/s
D) 4.6 m/s
E) 10 m/s