Question

訪客耶

為什麼速度不變動能還是減少了，謝謝！

A jet airplane
begins a trip at an
altitude of 9000 m,
traveling 200 m/s.
One hour later in
the flight, it travels
at the same speed,
but at an altitude of
4500 m. How was its
kinetic energy
changed?
©Cengage
a. It was reduced to half.
b. It was doubled.
C. It was not changed.
d. It would be slightly less.
Slide 8-4

Answer 1

呵

有沒有可能題目當飛機在做旋轉

呵

就是繞著地球轉，半徑變小，但走的距離一樣
...好吧，我好像在胡扯