物理問題

sosseres

原帖由 pipi 于 20-4-2004 12:46 PM 发表


我今天去試試。說我＂起笑＂ 就 ＂起笑＂。。。

u will know why when u study form 6 physic...

but i will briefly explain over here. when the is running, the direction is x-axis, and u throw the ball at y-axis at the same time. so the direction of that ball is not going along y-axis, it was going between the direction x- and y-axis with a certain angle (sorry, i cannot draw over here). tat's why the ball still can come back to your hand after u throw.

:)

是不是momentum？？

sensor

嚴格說起來 在馬來西亞丟的話 會偏離原處一點點.....

因為地球自轉(圓周運動)
自然會產量有一股離心力 會改變物體降落的地點

sosseres

原帖由 I_dunno 于 2-6-2004 04:01 PM 发表
Isn't this the problem of Projectile Motion?

yes, you are corect!!! have to consider x-y plane, then u will see the ball is actually moving like projectile, and not vertical.

blackbird

好像很复杂酱的！

当你在地球抛球时你的 initial frame 是地球并假设它是静止或constant velocity,球就会掉落在手上。

就算在另一个 moving frame里，除非它是加速不是constant velocity，球就不会掉落在手上。

当然是那个人的手里咯，你没听说过伽利略在的船上面的 experiment?

davidchong1986

是准确无误地落入手中!!