It was cold yesterday. Tom didn't go out. He did housework. Sam went to play football. And he had a cold. He fell ill today. He's got a fever. Lili phoned him. She will come to see Sam. Sam's mother cooked lunch. They had noodles and eggs for lunch. Sam drank lots of hot water. It's good for him.
某航母跑道长200m，飞机在航母跑道上加速时，飞机发动机产生的最大加速度为6m/s2，起飞需要的最低速度为50m/s，通过计算判断，飞机能否靠自身发动机从舰上起飞？
为了使在开始滑行时具有一定的初速度，航空母舰装有弹射装置．那么，飞机在滑行前，需要借助弹射系统获得的最小初速度为多少？
