You throw a stone vertically upward with an initial speed of 6.4 m/s from a third-story office window. If the window is 14 m above the ground, find… You throw a stone vertically upward with an initial speed of 6.4 m/s from a third-story office window. If the window is 14 m above the ground, find the time the stone is in flight.and Find the speed of the stone just before it hits the ground.