Physics, 01.08.2019 23:30 khikhi1705

An astronaut on a distant planet wants to determine its acceleration due to gravity. the astronaut throws a rock straight up with a velocity of +10.9 m/s and measures a time of 23.9 s before the rock returns to his hand. what is the acceleration (magnitude and direction) due to gravity on this planet? (positive = up, negative = down)

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