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 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 to promoting energy-saving and environmental protection technologies and projects. CECIC has responsibility for 23 billion renminbi of investment in the national energy conservation fund for basic construction projects. It has promoted 13 major energy-saving measures and has completed more than 3,000 large-scale energy efficient and environmental protection projects. The president is Xiaokang Wang.