Why i can't flying in the sky?(5 point)
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发布时间:2024-04-25 12:04
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时间:2024-07-25 10:11
Due to Newton Third Law of motion
a force with opposition direction exists when an object is being forced. When the bird's wing moving up and down
there exists a force downward and the air push the bird upward(also e to the pressure difference). The condition is that the surface area of the wing should be large so as to gain a larger pressure. Pressure = Force / Area ----> Force = (Pressure) (Area) When area increases
the force increases. As the surface area of your hand is not large enough
you can not fly.
参考: Newton's Law of motion
1. There are more food on the ground. 2. It is very tired to fly
it is waste of energy. 3. If you can fly
there is a pair of wings. They must be very big and disturb you life. 4. If you can fly
you will ask " Why can I fly ? " I want to fly too.
因为人既重量比雀仔高好多
而且雀仔既翼好大块
当向下摆动时
就可以将大量空气推去下面
空气就会比番反作用力比只雀仔
令到佢向你移动. 由于雀仔既体重连1KG都唔够
佢既重量就细过10N
只要雀用大过或者等于10N既下向下摆动对翼
就可以向上飞. 相*
由于体重大部份在50KG以上
重量就大过500N
须要制造大于500N(相等于举起自己)向下既力先可以
向上飞
就算真系比到500N向下既力
由于人类冇翼
当你一用力既时侯
空气已经散开左
所以你跟本比唔出500N向下既力
所以
人类系好难飞到.
参考: ME