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Question: 28 a rock falls freely from rest near the surface...

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28. A rock falls freely from rest near the surface of a planet where the acceleration due to gravity is 4.0 meters per second. What is the speed of this rock after it falls 32 meters? (1) 8.0 m/s (2) 16 m/s (3) 25 m/s (4) 32 m/s
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