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- You go to the roof of the twelve story building and look over the edge to the reflecting pool 170 feet below. You drop your book over the edge at the same instant that azmira chucks his book straight down at 48 feet per second . By how many seconds does his book into the water?A ball is thrown vertically upward with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s², how high will the ball go? And what is the total time it takes for the ball to reach its highest point and then return to the ground?An object is thrown vertically downward at 18 m/s from a window and hits the ground 1.6 s later. What is the height of the window above the ground? (Air resistance is negligible.)
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