1. Consider a rocket of mass MR carries its fuel of mass MF. The speed of the rocket varies as the burnt fuel is expelled. The velocity of the exhaust gas relative to the rocket is vex. If the initial velocity of the rocket is zero, what the velocity of the rocket is when the fuel is depleted?
(A)
(B)
(C)
(D)
(E)

答案:登入後查看
統計: 尚無統計資料