A 2 kg toy car can move along an x axis. Graph shows force Fx, acting on the car which begins at rest at time t = 0. The velocity of the particle at t = 10 s is:

∫dp = pf-pi = ∫F dt        = Area under the curve          pi = 0Net area = 16-2-2 = 12 N-s              = Vf = 132 = 6 i^ m/s[As momentum is positive, particle is moving along positive x axis.]