A student used a video camera to record another student dropping a marble through water in a graduated cylinder. The students watched the video in slow motion and made the observations shown below. During which part or parts of the experiment did the marble experience balanced forces? Marble Drop Experiment Marble O Speed increases. Graduated qylinder Water FO Speed decreases. O Speed is constant Part 1 and 2 Only Part 1. Part 3 Only Part D

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”