1. Calculate the acceleration due to gravity on Mars. It's a is roughly 1.5 AU. It's mass is about 1/10 earth's and its radius is roughly half of earth. Also find how long it takes to orbit the sun.
2. Revisit the rocket problem. Mass is .100 kg and the engine provides 12-N of thrust for 0.25 seconds. Find acceleration, max v and max height
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