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Unformatted text preview: Problem: We read in the textbook that something slows down when its velocity and acceleration are in opposite directions, and it speeds up when they are in the same direction. There is also an acceleration when direction changes. So, for an object you throw straight up, what directions must the acceleration be for the three parts of the motion, going up, at the top, and coming down? Select One of the Following: (a) up, zero, down (b) zero, zero, down (c) zero, zero, zero (d) zero, down, down (e-Answer) down, down, down Solution It slows down going up, so acceleration must be down. It turns around from up to down, so direction changes in the downward direction at the very top, evne though it isn’t moving, so down, and it speeds up on the way back down, so down!!! Total Points for Problem: 2 Points 2...
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