In the laboratory, a $$\(0.5-\mathrm{kg}\)$$ cart collides with a fixed wall, as shown in the preceding diagram. The collision is recorded with a video camera that takes 20 frames per second. A student analyzes the video, placing a dot at the center of mass of the cart in each frame. The analysis is shown above. Which of the following best estimates the change in the cart's momentum during the collision?

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