During a physics class on the planet Xoltac, students are asked to determine the gravitational acceleration using a particle launcher that has a muzzle velocity of 10.0 m/s. They find that the maximum horizontal range of the particles is 20.0 m.
  1. What is the gravitational acceleration on Xoltac?
  2. Assume the students now use a launching angle of 60o. What is the maximum height the particles reach?
  3. How does the time to go up to the maximum height compare to the time to come back down?

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