15 4. A 0.5 kg particle moving along the x-axis experiences the force shown in the graph. The particle's velocity is 2 m/s at x = 0 m. What is its velocity at 3 m? 10 a. 4.2 m/s Force (N) b. 6.5 m/s 5 c. 7.4 m/s d. 9.7 m/s O O 1 2 x (m)