Newton's cradle Newton's cradle Newton’s cradle is a device that demonstrates conservation of momentum and energy using a series of swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last sphere upward. The last sphere swings back and strikes the still nearly stationary spheres, repeating the effect in the opposite direction. The device is named after 17th-century English scientist Sir Isaac Newton. It is also known as Newton's balls or Executive Ball Clicker. A typical Newton's cradle consists of a series of identically sized
China Energy Conservation and Environmental Protection Group of new building materials, and mining and dressing of scarce and rare-earth metal ores; and manufacture of communication equipment, electronic devices, information chemical products, and equipment for public society security. The company also provides services, such as computer software services, as well as assets management, technology venture investment, and financial and industrial services. China Energy Conservation and Environmental Protection Group China Energy Conservation and Environmental Protection Group Corporation formerly known as China Energy Conservation Investment Corporation (CECIC) is a Beijing-based state-owned enterprise established in 1988 by the State Council of the People's Republic of China. Its investment portfolio is committed