想問一問physics concept(力學) velocity& displacement

2008-12-07 9:01 pm

想問一問
我知道acceleration可以同velocity可以唔同direction
example:個波拋上空中...velocity向上但acceleration向下

咁我就想問下有冇velocity同displacement唔同direction?
如果有可唔可以give埋example=]
thx^^

回答 (1)

Uncle Michael

2008-12-08 3:17 am

✔ 最佳答案

When a body is in motion, the displacement and the velocity of the body may have different directions.

For example, consider an object is projected upwards from the ground. After the object reaches the maximum position, it falls downwards. Now, the direction of the displacement is pointing upwards, but the direction of velocity is pointing downwards.

運動中物體，其位移與速度是可以不相同的。

例如，考慮一物體由地面向上投射，物體經過最高點後向下跌，當時位移的方向向上，但速度的方向向下。
=

👍 0 👎 0