價格：免費
檔案大小：50.6 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Newton imagined a giant cannon capable of firing cannonballs at any velocity. If the cannonball is fired at a normal speed it will travel on an arc and fall to the Earth. Increasing the cannonball's speed will increase the distance traveled and widen the arc. With enough speed the cannonball's downward motion, caused by the pull of gravity, will be matched by the curvature of the Earth.
The cannonball is continuously falling around the Earth, because it has attained such a great horizontal speed it never gets any closer to the Earth. The International Space Station, and most communications satellites, reside in a range of distances known as Low Earth Orbit, 200-2000 kilometers from the surface. At 200 kilometers up, to exactly counteract gravity's downward pull, a satellite must travel at an astounding 7000 meters per second, or 15,700 miles per hour.
Open source: https://github.com/alecKarfonta/newtonsCannon2
Email me with any updates you've made and I will incorporate them into this live app.
支援平台：iPhone, iPad