The concept of air force
When air flows across a surface, forces are generated in different directions e.g. resistance force and lifting force. When air flows under an object, dynamic reaction of air forms a lifting force.
Wind force is the force of moving air. Moving air makes pushing force and lifting force. These forces are the main power of a glider.
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The concept of a catapult:
A catapult applies the concept of lever mechanic. It uses the elasticity of a belt and wood to balance the downward force. The lever arm…
The concept of electromagnet
When electric current passes through the metal wire, it magnetizes the wire temporarily and produces a magnetic field. An electromagnet is formed. It stops…
The formation of whirlwind
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Virtual Reality defines as “close to reality”. Nowadays, virtual reality technology can integrate sounds, images, graphics and texts to let the users have the sense of presence at…
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