At t = 2.0 s two carts, A and B, are side by side on a straight track. The slope of cart A’s position–versus–time graph is constant at 3.0 m/s. The slope of cart B’s position–versus–time graph increases steadily from 2.4 m/s at t = 1.8 s to 3.6 m/s at t = 2.2 s. Identify which cart has non-zero acceleration at t = 2.0 s (state the sign of that acceleration) and predict which cart will be farther along the +x direction at t = 2.1 s.