Join the IDNLearn.com community and start exploring a world of knowledge today. Join our community to receive prompt, thorough responses from knowledgeable experts.

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws the rock straight up with a velocity of + 15 m/s and measures a time of 20.0 seconds before the rock returns to his hand. What is the acceleration (magnitude and direction) due to gravity on this planet?