Cart A Cart B Cart C Time Position Time Position Time Position Os ? Os ? Os ? 1s 30 cm 1s 30 cm 1s 30 cm 2 s 60 cm 2 s 50 cm 2 s 50 cm 3 s 120 cm 3 s 70 cm 3 s 90 cm 1. Which of the three carts appears to move with constant speed? Explain how you can tell. 100 2. Represent the motion of this cart on the position vs. time graph provided. 9) E -80 position (cm) -70 3. Determine both the speed and initial position of the cart that you identified as having constant speed. -60 -50 -40 -30 -20 -10 0 time (s) 4. Using the symbols x and t, write an equation that describes a model of the position for the cart that you identified. Include appropriate units with any numerical values in write in your equation.