✔ 最佳答案
you go find the definitions, it's easy for you
摩擦力 is formed the 電磁作用力 within atoms, it could exist in solid, liquid, or gas state. since fiction is formed within dropping rain is 摩擦ing with air particles, it instantly increases its speed, however, there is a maximum speed. (why does maximum speed exists? well, consider that it increases its speed each feet in the air and the falling distance is thousands of meters.)
2007-11-22 20:40:27 補充:
in between solid state and liquid state:water's speed is slowed down by fiction caused with the pipe, same theory, when a bullet is shot straight in the water, its damage is greatly depressed.
2007-11-22 20:47:42 補充:
decrease* not depressed - - If a car drives over an oil pit, it reduces fiction causing with the ground, which might lead to severe car accident!in between solid state and gas state:A running car uses its most energy on pushing gases apart in front of it.
2007-11-22 21:00:38 補充:
decreased* sor = =When a spaceship returns to earth, fiction is caused when its surface is 摩擦ing with air particles which causes high temperature.a parachuter nevertheless would be landing with a maximum speed at last!
2007-11-22 21:00:53 補充:
in between solid state and solid state:字痕 is being 留下 within pencil and paper when they are being 摩擦ed; objects are stable in one specific point, and it's the reason that you and I could walk...
2007-11-22 21:03:35 補充:
摩擦 = rub"字痕 is being 留下 within pencil and paper when they are being 摩擦ed" -- writings are formed when a paper is being written by a pencil
2007-11-22 21:05:12 補充:
電磁作用力 = kinetic energy..??摩擦力 = ficitiondone, have fun lol