Halliday, Resnick & Walker — Motion Along a Straight Line: Problem 50

At time \( t = 0 \), apple 1 is dropped from a bridge onto a roadway beneath the bridge; somewhat later, apple 2 is thrown down from the same height. Figure 2.18 gives the vertical positions \( y \) of the apples versus \( t \) during the falling, until both apples have hit the roadway. The scaling is set by \( t_s = 2.0 \text{ s} \). With approximately what speed is apple 2 thrown down?