Il A heavy ball with a weicht of 100 N (m 10.2 kg) is hung. from the ceiling of a lecture hall on a 4.5-m-long rope. The ball. is pulled to one side and released to swing as a pendulum, reach-. ing a speed of 5.5 m/s as it passes throuoh the lowest point.
Inventions. The huochong gun was invented in China during the Ming dynasty. It was also called the tongjiangjun, which meant bronze general. This was an important invention of the time period because the Ming Dynasty was creating weapons to defend their dynasty, and they came across the gun.t was also called the tongjiangjun, which meant bronze general. This was an important invention of the time period because the Ming Dynasty was creating weapons to defend their dynasty, and they came across the gun.
Ming Dynasty Inventions. The Ming Dynasty (1368-1644) is regarded to be one of the glorious periods in the history of China. Aside from its spectacular edifices, enchanting tourist attractions, and the wonderful Great Wall, the Ming Dynasty was also known for its amazing innovations.hese are just few of the great inventions of Ming dynasty which swept through the ages all over the world. These contributions are up to now widely used, leaving a lasting mark not only in the history of China but of the world.