✔ 最佳答案
Q: 直升機穩定地離巴士地板20cm滯留,那直升機也是時速70km/h前去嗎?若留在車頭附近,會因為剎車而"向前衝"嗎?
Yes. The speed of the heliocopter is also at 70 km/h. When the bus brakes, the helicopter would move forward.
若直升機從底層爬升到上層,上到上層就就被巴士甩掉嗎?
No. It won't.
如果直升機從上層升起,會被甩掉嗎?如果不會,當直升機升高點會跟不上嗎?另外飛出窗外,會被甩掉嗎?
As long as the helicopter is inside the bus, it will travel along with the bus.
If the helicoper flies outside the bus, air resistance will slow down the forward motion of the helicopter, provided that there is no forward propulsion given to it.
Note: be aware that in answering the above questions, we have assumed a closed and isolated system inside the bus. That is, any force given to the helicopter are internal force. If the windows of the bus are open, then the bus cannot be consided as a closed system as there is wind blowing into the bus (an external force), the motion of the helicopter will be affected.
