咁其實咩係external force acting on the objects? 可唔可以比d例子?
謝謝
更新1:
sorry, 有其他例子嗎? = = 請詳細講下, 唔該曬~~~~~~~~~~
conservation of momentum, 幫下手, thx~
2008-03-24 5:51 am
total momentum before collision = total momentum after collision, provided that there is no external force acting on the objects.
咁其實咩係external force acting on the objects? 可唔可以比d例子?
謝謝
咁其實咩係external force acting on the objects? 可唔可以比d例子?
謝謝
回答 (2)
2008-03-24 6:25 am
✔ 最佳答案
external force acting on the objects may be the wind.when the mass of the objects are small, the effect of wind
will be greater. for example the object may be the table tennis ball.
2008-03-25 8:34 am
我都好想知有冇其他例子
收錄日期: 2021-04-29 20:23:39
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