A 600 g cart with a force sensor attached starts at rest on a track. The force sensor exerts a force on the cart to speed it up. The graph shows the force F exerted by the sensor on the cart as a function of time t. The change in the cart's * momentum during the time interval shown is most nearly F(N) 6.0 4.0 2.0 0.0 t(s) 2.0 3.0 4.0 5.0 6.0 25 Ns O 30 Ns O 13 Ns O 4.0 Ns O 8.5 Ns