u外力控制 ( External - forced Control) a藉由外在的干預來進行控制，也就是透過外在所加諸於個人...
... (glass, crown, strap) and misusages ( any collisions by external forces to cause water infiltration) are not covered by the warranty. The...
...motion and force (action): The 1st law (law of inertia) says, if the total external force is zero, then whatever is moving will move at a constant velocity...
... of motion as an example: 1st Law of motion (law of inertia): if the total external force is zero, then whatever is moving will move at a constant velocity...
... referred to the momentum in a blow, in contrast to "sharp" force , sucn as that from a knife, bullet, pointed objects..... etc. which can inflict external injuries as penetrations, cut wounds and puncture ...
O-ring release about reflected the other day, quite unexpectedly found hurt at the bottom, on this we recognize injuries are caused by external forces , based on long-term cooperation agreement can help us handle
1.題目是要你舉例一個外力合不為零,但是系統的速率為一定值的情況 最明顯的就是圓周運動拉，圓周運動的合力恆指向圓心，但是速度卻保持不變，不過速度就有變化了，因為方向一直在改變 2. 反過來問，什麼情況外力為零，速率不為零，這提更簡單了，那就是等速度運動阿，在外太空...
