The roaring typhoon uprooted the tree, indicating that the object has energy.
The roaring typhoon uproots trees, which means that typhoons can do external work, so typhoons have energy, and an object can do external work, so we say that it has energy. The more work an object can do externally, the more energy it has. For example, flying bullets pierce objects, kicking football breaks glass, howling wind uproots trees, and rushing river drives water wheels to turn ... All these objects have energy.
Function of energy:
Objects with high energy have great ability to do work. Wind has energy, so people install windmills and use the wind to do work. The rapids of the Yangtze River and the Yellow River go straight down, which contains a lot of energy. People build dams and install turbines, so that the water falling from a height can drive the turbines to rotate and drive the generators to generate electricity.
energy and nature: it can be divided into renewable energy and non-renewable energy, and fossil energy is the main energy in the world.
energy and history: solar energy is the only energy used in ancient times, and its utilization will not produce pollution. The utilization of wood, wind power, animal power and water power has promoted the development of human civilization.