# 20 Below is a speed-time graph taken from an experiment in which you gave a cart moving a track three quick pushes to increase its speed. The first quick push began at 1.0 sec, the second quick push began at 4.0 sec, and the third quick push begari at 8.0 sec. All pushes ha the same strength A simulator could give us a speed versus time graph like the one given below and, also, 'measure' the force acting on the cart in the simulator model. On the blank force versus the graph below draw how you think the force acting on the simulator cart varies (if at all) during the same 10-second time period shown on the speed versus time graph. (Note: It only the shape of the graph that is important for now; a specific value for any force is no given). Speed time force time