Assume no air resistance.
1. How far can a ball fall in 5 seconds?
2. If you want to throw a ball upwards so that it hits a window 20-m above your hand, with what speed should you throw it? How long will it take to hit the window? (You can solve either part first.)
3. How does the time to fall a certain distance on the Moon compare to the time to fall the same distance on Earth? Moon gravity is 1/6 that of Earth.
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