AP物理题 有关自由落体,在线等~ A stone is thrown straight up from the top of a building with initial velocity 40ft/sec and hits the ground 4 sec later. The height of the building, in feet, is A 88 B 96 C 112 D 128 E 144 中文翻译: 一块石头从楼顶竖直向上扔去,初速度为40尺/秒,石头在4秒后落到地面。求问楼的高度。